Answer:
A. 0.56
Step-by-step explanation:
Conditional Probability
We use the conditional probability formula to solve this question. It is
In which
P(B|A) is the probability of event B happening, given that A happened.
is the probability of both A and B happening.
P(A) is the probability of A happening.
In this question:
We want to find .
We can relate the numbers using . So
P(H) = 0.70 , P(DH/H) = 0.80
So
The correct answer is given by option A.