Question

the number of numbers divisible by 5 and lying between 40000 ad 50000 that can be formed from the digits 0,3,4,5,8 and 9, when repetition of digits is not allowed is

Answer 1

Answer:

25

Step-by-step explanation:

Given digits are 4, 5, 6, 7, 8 and repetition of digits is allowed.

Clearly, the required number must have 4 at the thousand's place.

So, this place can be filled in 1 way.

Since each number is divisible by 5, so we must have 5 at the unit's place. So, unit's place can be filled in 1 way.

Each of the hundred's and ten's places can be filled in 5 ways.

∴ the required number of numbers=(1×1×5×5)=25.