Out of 15 students in a class, 8 are wearing blue shirts, 4 are wearing green shirts, and 3 are wearing red shirts. Four students are to be selected at random. What is the probability that at least one is wearing a green shirt?  Choose the most appropriate option:
A) 39/61	B) 49/71	C) 59/81	D) 69/91	E) 79/101
Total possible ways to choose 4 students out of 15 = 15C4 = 1365   The number of ways to choose 4 students with no green shirts = 11C4 = 330   P(no green shirts) = 330/1365 = 22/91   P(at least 1 green shirt) = 1 - 22/91 = 69/91   The answer is 69/91.
<result>D</result>
Out of 15 students in a class, 8 are wearing blue shirts, 4 are wearing green shirts, and 3 are wearing red shirts. Four students are to be selected at random. What is the probability that at least one is wearing a green shirt?