(Solved): An unfair coin with Pr[H]=.25 is flipped. If the flip results in a head, a student is selected at ra ...

An unfair coin with Pr[H]=.25 is flipped. If the flip results in a head, a student is selected at random from a class of ten boys and 12 girls. Otherwise, a student from a different class containing 6 boys and 5 girls is selected. a) What is the probability of selecting a girl. b) What is the probability of selecting a girl, given that the filp resulted in heads