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QUESTION
Fifteen batteries are tested to determine whether the battery life is as long as advertised . Four batteries fail the test. From all fifteen...
Fifteen batteries are tested to determine whether the battery life is as long as advertised . Four batteries fail the test. From all fifteen batteries, two are selected at random without replacement .
Find the probability for each of the following scenarios.
(a) both batteries passed the test
(b) both batteries failed the test
(C) at least one battery failed the test
