wiz-icon
MyQuestionIcon
MyQuestionIcon
2
You visited us 2 times! Enjoying our articles? Unlock Full Access!
Question

The total number of 9 digit numbers which have all different digits is

A
9!×2!
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
10!
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
9×9!
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
None of the above
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is C 9×9!
The number is to be of 9 digits.

The first place can be filled in 9 ways only (as 0 can not be in the left most position )

Having filled up the first place the remaining 8 places can be filled in 9×8×7×...×2=9! ways

Hence, total number of 9 digit numbers with distinct digits is 9×9!

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
Join BYJU'S Learning Program
CrossIcon