There are 6 cards numbered from 1 to 6. They are placed into a box, and then one is drawn and put back and then another card is drawn and put back. what is the probability that one of the cards was 5 if the sum of the two was 8?

Answer 1

This is the probability of drawing a 5 and a 3.

P(5) = 1/6

P(3) = 1/6

The probability of both/all events occurring is found by multiplying the individual events.