Advertisements
Advertisements
Question
The total number of 9 digit number which has all different digit is:
Options
10!
9!
9 × 9!
10 × 10!
Advertisements
Solution
9 × 9!
APPEARS IN
RELATED QUESTIONS
How many 3-digit numbers can be formed by using the digits 1 to 9 if no digit is repeated?
Find x in each of the following:
Which of the following are true:
(2 × 3)! = 2! × 3!
Write the number of numbers that can be formed using all for digits 1, 2, 3, 4 ?
If nP4 = 12(nP2), find n.
How many 6-digit telephone numbers can be constructed with the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 if each numbers starts with 35 and no digit appear more than once?
Evaluate the following.
`(3! + 1!)/(2^2!)`
Three men have 4 coats, 5 waist coats and 6 caps. In how many ways can they wear them?
Each of the digits 1, 1, 2, 3, 3 and 4 is written on a separate card. The six cards are then laid out in a row to form a 6-digit number. How many distinct 6-digit numbers are there?
Find the number of permutations of n different things taken r at a time such that two specific things occur together.
