Answer:
A. 0.30
Explanation:
If A and B are independent events, then P(A/B)=P(A).
From the question we have the following probabilities:
P(A)=0.30
P(B)=0.40
Since events A and B are independent;
P(A/B)=P(A).
This implies that:
P(A/B)=0.30
The correct answer is A.