A box is filled with 12 yellow cards, 3 red cards, and 3 brown cards. A card is chosen at random from the box. What is the probability that the card is not red?

Answer 1

There are 18 total cards in the box (12 yellow, 3 red, and 3 brown).

R^c = not a red card

P(R^c) = 1 - P(R) = 1 - (3/18) = 15/18 = 5/6

The probability of drawing a card that is not red is 5/6 or 0.8333.