R D Sharma Solutions for Chapter: Permutations, Exercise 2: EXERCISE 16.2

How many three-digit numbers are there with no digit repeated?

How many three-digit numbers are there?

How many three-digit odd numbers are there?

How many different five-digit number licence plates can be made if first digit cannot be zero and the repetition of digits is not allowed,

How many different five-digit number licence plates can be made if the first-digit cannot be zero, but the repetition of digits is allowed?

How many four-digit numbers can be formed with the digits $3,5,7,8,9$ which are greater than $7000$, if repetition of digits is not allowed?

How many four-digit numbers can be formed with the digits $3,\mathrm{}5,\mathrm{}7,\mathrm{}8,\mathrm{}9$ which are greater than $8000$, if repetition of digits is not allowed?

In how many ways can six persons be seated in a row?