Question

2. The number of 4-digit numbers that can be
formed by using digits 1, 2, 3, 4, 5 such that
atleast one digit is repeated is
(a) 43 - 4! (b) 54 - 5!
(c) 45 - 5! (d) 54 - 4!​

Answer 1

Answer:

I thing answer is C..

But not sure about the question..

Answer 2

They answer is c mak