Question

Find the total numbers greater than 4000 that can be formed with digits 2, 3, 4, 5, 6 no digit being repeated in any number ?
A) 120
B) 256
C) 192
D) 244

Answer 1

since given digits r
5
we take 5 digit number
all 5 digit numbers r greater than 4000
so _ _ _ _ _
↓ ↓ ↓ ↓ ↓
5 4 3 2 1
5! ways
since no digit is repeated
=> 120 ways