Let and . How many bijective functions satisfy the condition…

MATHEMATICS · Subjective · CBSE · Mathematics · Permutations and Combinations · Permutations and Combinations

Problem

Let

A=\{a_1,a_2,a_3,a_4\}

and

B=\{b_1,b_2,b_3,b_4\}

. How many bijective functions

f:\colon A\to B

satisfy the condition

f(a_1)\neq b_1