Question

From a group of 120 students, those taking geometry and biology are counted. 20 students are taking biology. 30 are taking geometry. 15 are taking both geometry and biology. Find the probability that a student is taking geometry given that they are taking biology.

Answer 1

Answer:

N(U)=120

n(B)=20

n(G)=30

n(N ∩ G)=15

n₀(G)=n(G)+n(N ∩ G)

=30+15=45

the probability of student taking geometry is 45.