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nikklg [1K]
2 years ago
7

A math teacher randomly selects one student in a class to write a probability question on a chalkboard. The teacher then randoml

y selects a different student to answer the probability question. There are 12 boys in the class, and the ratio of boys to girls is 2:3. Find the probability that the teacher selects a girl first and a girl second. Write your answer as a decimal rounded to the nearest thousandth.
Mathematics
2 answers:
Elena L [17]2 years ago
4 0
The Probability that she does is 51/145 or 35%. I hope i am right and was able to help.
jekas [21]2 years ago
4 0

Answer:

The probability that the teacher selects a girl first and a girl second is 0.352

Step-by-step explanation:

Number of boys in class = 12

let number of boys in class = 2x

number of girls in class = 3x

According to the question,

2x = 12

x = 6

So, number of girls = 3x = 3 × 6 = 18

Total number of students = 18 + 12 = 30

Probabiltiy=\frac{Number\:of\:favorable\:outcome}{Number\:of\:Total\:outcome}

Probability of selecting a girl first and second girl = \frac{18}{30}\times\frac{17}{29}

=\frac{51}{145}=0.352\:(nearest\:thousandth)

Therefore, The probability that the teacher selects a girl first and a girl second is 0.352

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Answer:

$1A

Step-by-step explanation:

The elements of a formula only can have the following format:

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6 0
2 years ago
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Answer: Probability that a randomly selected unit will contain at least two surface- finish defect is 0.04.

Step-by-step explanation:

Since we have given that

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4 0
2 years ago
An animal shelter has $2500 in its reserve fund. The shelter charges $40 per animal placement and would like to have at least $4
Elena-2011 [213]

Answer:

Step 1

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Step-by-step explanation:

hope that helped

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2 years ago
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