How many ways can $3$ books be selected from $7$ different books?
Practice this question from Chapter Mock 12: Permutation, Combination and Probability, with options and an explanation.
Question
How many ways can $3$ books be selected from $7$ different books?
Option A
21
Option B
28
Option C — Correct answer
35
Correct choice.
Option D
42
Explanation
Selection uses combination: ${}_7C_3=\frac{7\times6\times5}{3\times2\times1}=35$.