Question

You have 10 pennies in your pocket. Of those pennies, 3 are Canadian. Suppose you pick a penny out of your pocket at random. Find P(not Canadian).

Answer 1

The answer is: 3
--
10

Answer 2

P(not Canadian) = 1 - P(Canadian)

P(Canadian) = 3/10

Thus, P(not Canadian) = 1 - 3/10 = 7/10