If a fair die is rolled once, what is the probability that a 3 occurs on at least one roll?
Choose the correct answer
A) 25/36	B) 125/216	C) 1/6	D) 1/36	E) 5/6
Questions such as these that talk aboutat leastormaximumorminimumin probability questions should make sure realize that probability of any event (N) to occur = 1- P(Not N)   Thus, the probability of at least 1 roll = 1- Probability of NO 3s = 1- (5/6) = 1-5/6 = 1/6   5/6 is the probability of NOT getting a 3 in any 1 roll with 5 allowed numbers (=1,2,4,5,6) out of a total of 6 possibilities.   1/6 is thus the correct answer.
<result>C</result>
If a fair die is rolled once, what is the probability that a 3 occurs on at least one roll?