Question

There are 3 first grade children, 5 second grade children, and 7 third grade children in a room. When choosing two children, what is the conditional probability of choosing a second grade child, given that either a first or a third grade child was chosen first?

Answer 1

35.14%

IM NOT SURE WHY BUT I TOOK THE TEST ALSO I CANT TURN OFF MY CAPS LOCK LOL

Answer 2

0.3571 or 35.14%

Explanation:

There are 15 children in total in the class at first. Of those children, 5 are second graders and 10 are not.

If the first chosen children was not a second grader, there are 5 second graders among the 14 children left. The probability of selecting a second grade child is:

`P = (5)/(14)\\P=0.3571\\P=35.71\%`

The probability is 0.3571 or 35.14%.