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:

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

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Answer:

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Evaluate the expression below when n = 4. If needed, answer as a fraction or a decimal.
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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

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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?
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Answers

Answer:

8 pounds

Step-by-step explanation:

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Answer:

8 pounds

Step-by-step explanation:

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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! :))

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Answers

Answer:

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Step-by-step explanation:

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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)    

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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Answers

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