Question

The number of 4 digit numbers formed using the digits 0, 2, 4, 7, 8 is

Answer 1

Hey there,

As 4-digit no have to be made 0 can't be the first digit

So,there are 4 ways to fill the first digit.

And there are 5 ways each to fill hundredth,tens and ones digit eachh.

Total no of ways =4×5×5×5=500.

Not sure it is right,but tried

Hope it helps .