If a box contains three blue cards and three white cards If two cards are drawn one at a time find the probability that both cards are blue if the draws are made with replacement?

The probability of drawing two blue cards froma box with 3 blue cards and 3 white cards, with replacement, is 1 in 4, or 0.25.

The probability of drawing one blue card is 0.5, so the probability of drawing two is 0.5 squared, or 0.25.