Mathematics High School

In a class of 30 students, 6 have a brother and 12 have a sister. There are 14 students who do not have any siblings. What is the probability that a student chosen randomly from the class has a brother and a sister?

Answers

Answer 1

Answer:

32 siblings from the class theres a possibility that some students had more siblings and not everyone has one

Step-by-step explanation:

.

Answer 2

The probability that a student chosen randomly from the class has a brother and a sister is [tex]\frac{1}{15}[/tex].

What is probability?

The chance that something will happen, or how likely it is that an event will occur.

Formula to calculate probability

probability of an event = [tex]\frac{number of favorable outcomes}{Total number of outcomes}[/tex]

According to the given question

we have total 30 students.

6 have a brother

12 have a sister

and 14 who don't have any siblings

If we se the provided Venn diagram

the number of students who have only sister is 10

and the number of student who have only brother is 4.

because, 6+12+14 = 32

but we have only 30 students

⇒ 2 students has a brother and a sister.

therefore,

the probability that a student chosen randomly from the class has a brother and a sister = [tex]\frac{number of students as a brother and a sister}{total number of students}[/tex]= [tex]\frac{2}{30}[/tex] =[tex]\frac{1}{15}[/tex]

Hence, the probability that  the chosen student from the class has a brother and sister is [tex]\frac{1}{15}[/tex].

Learn more about probability here:

https://brainly.com/question/11234923

#SPJ2

In A Class Of 30 Students, 6 Have A Brother And 12 Have A Sister. There Are 14 Students Who Do Not Have

Related Questions

hii please help i’ll give brainliest

Answers

The answer is C I believe:)


find the distance between (-1,-4) and (5,4)

Answers

Answer:

10 units

Step-by-step explanation:

√(-1-5)²+(-4-4)²

√(-6)²+(-8)

√36+64

√100

10 units

Answer:

Step-by-step explanation:

The rectangular floor of a classroom is 20 feet in length and 32 feet in width. A scale
drawing of the floor has a length of 5 inches. What is the area, in square inches, of the
floor in the scale drawing?

i cant find the answer anywhere else lol

Answers

25.6 square inches

20 divided by 5 is 4

32 divied by 5 is 6.4

Multiply them and get 25.6

find the solution of given expression

[tex] \sqrt{365 \times 365} [/tex]
​

Answers

Answer:

√(365×365)=√365²=±365

Evaluate the expression below when n = 4. If needed, answer as a fraction or a decimal.
6(n+8) - 5n

Answers

When n is equal to 4, the expression 6(n+8) - 5n evaluates to 52. This means that if we replace the variable n with 4, the expression simplifies to the constant value of 52.

To evaluate the expression 6(n+8) - 5n when n = 4, we substitute n with 4 and simplify step by step:

First, we substitute n with 4 in the expression:

6(4+8) - 5(4)

Next, we simplify the parentheses:

6(12) - 5(4)

Multiplying within the parentheses:

72 - 20

Finally, we subtract the two values:

52

As a result, the formula 6(n+8) - 5n evaluates to 52 when n is equal to 4. This indicates that the expression becomes simpler if we substitute the variable n with the number 4, which is 52.

for such more question on expression

https://brainly.com/question/4344214

#SPJ8

Find m 2x
(3x – 10)
D
E
B
mABC=
mZCBD-

Answers

Answer:

x--5

Step-by-step explanation:

2x+ x


Which graph shows the function
4y - x= 0?

Answers

Answer:

y=x/4

Step-by-step explanation:

add x to the other side of your equation so: 4y = x

now divide both sides by 4 so your y is isolated: y=x/4

Which is the slope of the line that passes through the points (4,2) and (6,7)?

Answers

Answer:

the slope of the line is 5/2

is the number of calories proportional to the number of miles? ​

Answers

Answer:

it depends on the amount of miles

Step-by-step explanation:

Solve the system of equations below by graphing each line on the coordinate plane provided. Then place a point where the solution of the system occurs. 3x + 2y = 8 x + 2y = 4​

Answers

Point Form:
(2,1)
Equation Form:
x=2 y=1

Please help me with this!!

Answers

it is 22 because
180°-(68+90) = 22
the answer is 22, 180-158=22

Write a set of ordered pairs that is represented by the arrow diagram 49,13 69,32 18,22 78,57 28,57 the set of order pair is? 

Answers

Answer:

The mapping can also be represented as the set of ordered pairs: (4, 9) (5, 10) (6, 11) (7, 12). The ordered pair preserves the directional property of the relation. It is consistent with the order of points plotted on a Cartesian Plane represented by (",$). In the Arrow Diagram that follows.

Step-by-step explanation:

i need help fast!! and i’m almost failing

Answers

Answer:

well I would love to help-where is the pic...?

i dont know how to do this, please help​

Answers

Answer:  B= 11

Step-by-step explanation:

4×+5 ayudenme por favor ;)​

Answers

Answer:

There are no Like Terms.

Answer: 54=x

Step-by-step explanation:

i need HELP !!!!!!!!!!!!!!!!

Answers

Answer:

I think the solution is (p,q)=(-2,-5)

HELP ! The angle measurements in the diagram are represented by the following expressions.
A= 6x – 2
B= 4x + 48
solve for x and then find the measure of a

Answers

Answer: 148

Step-by-step explanation:

Answer:

148

Step-by-step explanation:

khan

Paul is buying packages of hot dogs for a camping trip. Each package is 30 oz. If he buys 4 packages, about how many pounds of hot dogs is he buying?
480 pounds
4 pounds
8 pounds
10 pounds

Answers

Answer:

8 pounds

Step-by-step explanation:

30 x 4 / 16 = 7.5  but abt 8

Answer:

8 pounds

Step-by-step explanation:

30 ounces = 1.875 pounds

1.875 * 4 = 7.5 rounded up = 8

9+10=?
A. 5
B. 14
C. 21
D. 19
Please help

Answers

Answer:

19

Step-by-step explanation:

is this a joke?

Option D. [tex]19.[/tex]

Step-by-step explanation:

[tex]10 + 9 = 19.[/tex]

Answer this question to get marked as brainliest!!!

Answers

Answer:

22

Step-by-step explanation:

180 - 90 - 68

Answer:

22

Step-by-step explanation:

Equação do primeiro grau.
-10 + x = -8

Answers

Answer:

2

Step-by-step explanation:

An 8-foot roll of wrapping paper costs $9.60. What is the price per inch?An 8-foot roll of wrapping paper costs $9.60. What is the price per inch?An 8-foot roll of wrapping paper costs $9.60. What is the price per inch?

Answers

Answer:

$0.10

Step-by-step explanation:

STEPS TO ANSWERING THIS QUESTION

Convert the size of the wrapping paper to inches divide the total cost of the wrapping paper by the converted size

1 ft = 12 inches

8 feet = 8 x 12 = 96 inches

price per inch = total length of the wrapping paper in inches / total cost of the wrapping paper

$9.60 / 96 = $0.10

Customer Money Spent (in dollars) 1 $13 2 $46 3 $13 4 $87 5 $10 6 $5 7 $8 8 $16 9 $33 10 $57 A clothing store owner tracks the amount of money the last 10 customers spend in her store. The owner concludes that the typical amount spent by any customer is $28.80. The owner's conclusion A) is valid. The last 10 customers only bought sale items. B) is correct. This is the average amount spent by any customer. C) is invalid. This is not a good representation of all customers. Eliminate D) is unfair. The last ten people in the store may have been tired.

Answers

Answer:

Step-by-step explanation:

i think the anwer is c

Answers could be al in photo or 16

Answers

Answer:

803.84 Cm Squared

Step-by-step explanation:

A= π r2

A = 3.14 times 16 squared

A = 803.84

Laura borrowed $9,000 at 4% for 2 years. what was the total interest?

Answers

Answer:

$720

Step-by-step explanation:

I = Prt

I = (9000)(0.04)(2)

I = 720

The amount of money in a savings account is shown as a function of the number of days spent shopping. After 3 days of shopping how much money is left in the savings account.

A. 80$
B. 70$
C. 90$
D. None of the above ​

Answers

anwser is a

Step-by-step explanation:

These questions are very hard

Answers

They are not!
So put a point at 0,2 and then go down one and over four units. Keep doing that until you’re at the right. Then go back to the 0,2 and go up one and to the left 4 for every point.

At a middle school, 18% of all seventh grades are teacher's aides. 64 seventh graders are teacher's aides, how many seventh graders are at the middle school? (Round to the nearest whole)

Answers

Answer:

356 Seventh Graders

Step-by-step explanation:

All I did was find out what number 64 was 18% of, and that gave me the answer. I took 64 and put it over 18%, and set it across from X over 100%. I did the cross multiplication, and got 355.56, but rounded it to get 356. So there are 356 total seventh graders. Hope this is helpful...have a great day! :))

Hey only need help with this one problem.
5x+10y-15
thx','

Answers

Answer:

5 (x + 2y - 3)

Step-by-step explanation:

5x + 10y - 15 = 5*x + 5*2y  - 5*3

                    = 5* (x + 2y - 3)

Determine whether the equation is an identity or not an identity. Sin theta/cos theta + cos theta/sin theta = cos theta sin theta

Answers

Answer:

The equation is not an identity.

Step-by-step explanation:

Since we have Sin theta/cos theta + cos theta/sin theta = cos theta sin theta, we re-write as Sinθ/cosθ + cosθ/sinθ = cosθsinθ where theta = θ.

For the equation to be an identity, we need to show that L.H.S(left-hand-side)= R.H.S (right-hand-side)

So,

Sinθ/cosθ + cosθ/sinθ = (Sin²θ + cos²θ)/cosθsinθ (taking L.C.M = cosθsinθ)    

                                     = 1/cosθsinθ                         (Sin²θ + cos²θ = 1)

                                     ≠ cosθsinθ      

Since L.H.S = Sinθ/cosθ + cosθ/sinθ = 1/cosθsinθ ≠ R.H.S = cosθsinθ, the equation is not an identity.

Other Questions
If y is directly proportional to x and y = 17.5 when x = 21. PLEASE ANSWER THIS ASAP I WILL MARK YOU THE BRAINLIEST What constellation has two stars that point toward the North Star? A. Orion B. Polaris C. the Little Dipper D. the Big Dipper Find the due dates and maturity value for a $13,600 loan made to Jim Kovalchuk on February 7 for nine months at 11% interest Half a number increased by the quotient of p and t Why is immediate counseling of peers important after a $uicide (or attempted $uicide)? Can someone please answer these 3 questions giving brainliest what is -2 x 3 i do not understand this and this is my last problem In the circular flow model , Which of the following is on the selling side in the product market. A.Government B.Only households C.Only businesses D.Both businesses and households Please help Im struggling William drew a diagram of a box containing a gas for his science project. His drawing is shown. Solve the system of linear equations by substitution.3x 2y = 23x + 2y = 13The solution of the system is What is (f +g)(y) for the functionslook at the picture for answer choices :) SOMEONE PLEASE HELP ME ILL GIVE YOU BRAINLY IF YOU GET IT RIGHT!!!! Can a triangle have side lengths 10, 12, 15? 1.not enough information 2.no 3.yes (11y-36)63Solve for y identify the scale factor the process by which diploid organisms produce sex cells is called 1. Which of the following is a national resource?(a) gold and minerals(b) the money in the Bank(c) the people(d) all A groups of friends were working on a student film that had a budget of $1300 they used 43% of their budget on costumes. How much money did they spend on costumes