An eight digit number is formed from `1, 2, 3, 4` such that product of all digits is always `3072,` the total number of ways is `(23. 8C_k),` where the value of k is

A nine - digit number is formed using the digits 1, 2, 3, 5 and 7. The probability that the product of all digits is always 1920 is

A nine - digit number is formed using the digits 1, 2, 3, 5 and 7. The probability that the product of all digits is always 1920 is

Number of five digit integers such that the product of their digits is 2000 is 2K then K equals

.........are the 9 digit numbers formed from the number with all digits different.

Let N be the number of 6-digit numbers such that the digits of each number are all form the set {1, 2, 3, 4, 5} and any digit that appears in the number appears atleast twice. Then the number of all 6 digits is