If a fair die is rolled twice, what is the probability that a 2 occurs on at least one roll?
Answers:	A) 11/36	B) 125/216	C) 9/36	D) 1/3	E) 25/36
Probability of no 2s is 5/6 * 5/6 = 25/36, so the probability of at least one 2 is 1 - (25/36) = 11/36   The correct answer is therefore 11/36.
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If a fair die is rolled twice, what is the probability that a 2 occurs on at least one roll?