Question

How many 5-digit even numbers can be formed using the digits 1,2,5,5,4?​

Answer 1

There will be as many 4-digit numbers as there are permutations of 5 different digits taken 4 at a time. 5 5 4 5 1 P ! ! ! ! = 5 × 4 × 3 × 1 × 1 = 120 Among the 4-digit numbers formed by using the digits, 1, 2, 3, 4, 5, even numbers end with either 2 or 4.

Answer 2

Answer:

1080. You can make 1080 5-digit even numbers from 1,2,3,4,5,6,7 if no digit is repeated.