Question

In a group of 31 students, 7 study both Art and Biology.

14 study Biology but not Art.
7 study neither subject.
Given that a randomly selected student studies Art, what is the probability the student studies Art and Biology?

Answer 1

7/10 or 0.7 or 70%

Explanation:

I would use a venn diagram, and fill it in! Then there are 7 do A &B and 3 who just do A. That as a probaility, your answer!