The following clues for writing a five digit number is
1.→The number consist of 3 different digits
2.→All digits are even numbers greater than zero.
The four even digit are =2,4,6,8
So,Total Number of five digit numbers in which three digits are Identical is
= First three places can be filled by any of the four numbers and then fourth and fifth place can be filled by any of the remaining three numbers in 3 and 2 ways.
=4 ×3×2
=24 Numbers
The numbers are
22246,22264,22284,22248,22268,22286,44426,44462,44468,44486,44482,44428,66624,66642,66648,66684,66682,66628,88824,88842,88864,88846,88826,88862.
