Question

In a group of 20 students, 1 studies both Art and Biology.

1 studies 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

• 1/12

Explanation:

Total number is 20.

Distribution is:

• Art + Biology = 1
• Biology = 1
• Neither = 7

The rest = 20 - 9 = 11, the Art students

Total number of Art students becomes 12

The probability would be then:

• 1/12