Question

There are 28 students in a class. 13 of the students are boys. Two students from the class are chosen at random. a) If the first person chosen is a boy, what is the probability that the second chosen is also a boy? Answer in fraction

Answer 1

Using the probability concept, it is found that there is a $\frac{4}{9}$ probability that the second chosen is also a boy.

• A probability is the number of desired outcomes divided by the number of total outcomes.

In this problem, supposing that the first person chosen is a boy:

• There will be 27 students.

• Of those, 12 are going to be boys.

Hence:

$p = \frac{12}{27} = \frac{4}{9}$

There is a $\frac{4}{9}$ probability that the second chosen is also a boy.

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