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How many 3-digit numbers can be formed ...

How many 3-digit numbers can be formed by using the digits 1 to 9 if no digit is repeated?

A

10*10*10

B

9*9*9

C

9*8*7

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
3 digit numbers that can be formed using the digits from 1 to 9.
Required number of 3-digit numbers
= arranging 3 digits with the total number of 9 digits.
= `9P_3` = 9×8×7.
C is the correct answer.
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