Question

Suppose that 30% of flies are black, and 70% are grey. Two flies are chosen at random, what is the probability that the chosen flies are both grey? (please round to 2 decimal places)

Answer 1

Probability of choosing a black fly = 30/100 = 0.3

Probability of choosing a grey fly = 70/100 = 0.7

So, probability of choosing 2 grey flies = 0.7*0.7 = 0.49