Q63Multiple choice
Using the digits 1, 2, 3, 4, 5, 6, 7, a number of 4 different digits is formed. Find C1 C2 (a) how many numbers are formed?
- (i)840 (b) how many numbers are exactly
- (ii)200 divisible by 2? (c) how many numbers are exactly
- (iii)360 divisible by 25? (d) how many of these are exactly
- (iv)40 divisble by 4?