Find the indicated Complement The Probability that Stacy wil

Find the indicated Complement:

The Probability that Stacy will pass his statistics test is 0.90. Find the probability that he will fail his statistics test.

Solution

Note that passing and failing are complementary events.

Thus, their probabilities sum up to 1,

P(fail) = 1 - P(pass) = 1 - 0.90 = 0.10 [ANSWER]