SOLUTION: how many 3 digit numbers can be formed is the leading digit cannot be 0?

Question 382715: how many 3 digit numbers can be formed is the leading digit cannot be 0?
Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
There are nine digits (0-9) for the hundreds' digit, and 10 choices for the tens' and units'. This leaves 9*10*10 = 900.
Or, we can count the number of three digit numbers in the base-10 counting system. It ranges from 100 to 999, so the number of elements in the set {100, 101, ..., 999} is 900 (since the set is inclusive).
RELATED QUESTIONS
How many 3-digit numbers can be formed under the following conditions: a)leading digit... (answered by Edwin McCravy)

How many four-digit numbers can be formed under each condition? (a) The leading digit... (answered by Solver92311,ikleyn)

How many four-digit numbers can be formed under each condition? (a) The leading digit... (answered by ikleyn)

How many two-digit numbers can formed if the first digit cannot be 0 and no digit can be... (answered by stanbon)

How many eight-digit numbers can be formed if the leading digit cannot be a zero and the... (answered by Alan3354)

How many five digit numbers can be formed if the leading digit cannot be zero and the... (answered by richwmiller)

How many seven-digit phone numbers can be formed if the digit cannot be 0 or... (answered by Alan3354)

How many 8 digit numbers can be formed if the leading cannot be a zero and the last... (answered by ikleyn)

How many seven-digit numbers are there when 0 and 1 cannot be the leading number? (answered by stanbon)