math
posted by marissa on .
There are 5 yellow cards, 4 red cards, and 1 purple card. He draws a card at random, replaces it, and draws a second card. What is the probability that both cards will be red?

The probability of both/all events occurring is determined by multiplying the probabilities of the individual events.
P of red = 4/10
4/10 * 4/10 = ?