Question

A box contains n coins, m of which are fair and the rest of them are biased. the probability of getting a heads when a fair coin is tossed is 1/2, while it is 2/3 when a biased coin is tossed. a coin is drawn from the box at random and is tossed twice. the first time it shows heads and the second time it shows tails. the probability that the coin drawn is fair is

Answer 1

2/5is the probability

Answer 2

2/5is
the probability