Question

How many number plates are possible with 1,2,3,4,5(repetition is not allowed)

Ans : 325; How many number plates are possible with 1,2,3,4,5(repetition is not allowed); Ans : 325

Answer 1

let n no. is allowed

a=1

d=1

an=5

an=a+(n-1) d

5=1+(n-1) 1

5-1=(n-1)

4=(n-1)

n=5