A student has selected 8 books that she likes, but she has money only for 3 books. How many possible selections does she have?
A) 24
B) 240
C) 8
D) 56

Question

Quizplus · Accepted Answer

To find the possible selections, we need to use the combination formula, which is nCr = n!/r!(n-r)!. In this case, we have 8 books and need to select only 3, so the formula becomes 8C3 = 8!/3!(8-3)! = 8x7x6/3x2x1 = 56. Therefore, there are 56 possible selections.

A Student Has Selected 8 Books That She Likes, but She