The number of permutations of $5$ different objects taken $2$ at a time is:
Practice this question from Chapter Mock 12: Permutation, Combination and Probability, with options and an explanation.
Question
The number of permutations of $5$ different objects taken $2$ at a time is:
Option A
10
Option B — Correct answer
20
Correct choice.
Option C
25
Option D
60
Explanation
${}_5P_2=5\times4=20$.