What is the probability that a randomly selected child will

What is the probability that a randomly selected child will have red hair, given that he or she has straight hair?

Solution

P(a randomly selected child will have red hair | he or she has straight hair)

=P( probability that a randomly selected child will have red hair, and he or she has straight hair)/P(he or she has straight hair)

=0.25/0.5

=1/2

(answer)