Solve the problem.Ron finds 8 books at a bookstore that he would like to buy, but he can afford only 5 of them. In how many ways can he make his selection? How many ways can he make his selection if he decides that one of the books is a must?

A. 3360; 420
B. 6720; 840
C. 336; 210
D. 56; 35


Answer: D

Mathematics

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