How many 9-digit numbers of different digits can be formed?

How many 9- digits numbers of different digits can be formed?

How many different numbers of six digits can be formed with the digits 3,1,7,0,9, 5 ?

How many different numbers of six digits can be formed from the digits 3,1,7,0,9,5 when repetition of digits is not allowed?

How many different numbers of six digits can be formed from the digits 0,4, 5,7, 8, 9 with , repetition of digits is not allowed.

How many different numbers of 4 digits can be formed from the digits 0, 1, 2, ...9 if repetition is allowed.

How many different numbers of 4 digits can be formed from the digits 0, 1, 2, ...9 if repetition is allowed.

How many different numbers of 4 digits each can be formed with the ten digits 0,1,2,…9 when digits are not repeated?

How many different numbers of 4 digits each can be formed with the digits9,9,5,5,,3,3,,4,6.

How many different numbers of 4 digits can be formed from the digits 0,1,2,...9 if repetition is allowed,not allowed.

How many different numbers of 4 digits can be formed from the digits 0, 1, 2, ...9 if repetition is allowed, not allowed.