How many integers between 100 and 1000(both inclusive )consists of distinct odd digits ?

Explanation

Integers are to be formed with distinct odd digits between 100 and 1000.
The numbers between 100 and 1000 are of 3-digits.
The odd digits are 1,3,5,7,9.
The number of distinct 3-digit odd numbers`=""^5P_3=5*4*3=60`