Total number of one - one function from the set A = {1, 2, 3, 4} to the set B = {a, b, c, d, e} are
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) - 120
No. of elements in A = 4
No. of elements in B = 5
so no. of elements to pick from B = 4
No. of ways to do so = ${^5C}_4$
No of permutations → 4!
so total no of functions → ${^5C}_4×4!=120$