MATHEMATICS · Single correct · AP · AP Statistics · Probability Random Variables Distributions · Probability Random Variables Distributions
Problem
A fair coin is tossed twice. You earn Rs 3 for every head that appears and nothing for a tail. After observing that the first toss is a head, what is your expected total earning from the two tosses?
(a) Rs 3
(b) Rs 6
(c) Rs 4.5
(d) Rs 3.5