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anonymous
 5 years ago
a compnay wants to have 3 digit phone extensions with the 1st digit not being zero. how many phone extensions are possible?
anonymous
 5 years ago
a compnay wants to have 3 digit phone extensions with the 1st digit not being zero. how many phone extensions are possible?

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Yuki
 5 years ago
Best ResponseYou've already chosen the best response.0this is a straight forward counting principal problem.

Yuki
 5 years ago
Best ResponseYou've already chosen the best response.0this is a straight forward counting principal problem.

Yuki
 5 years ago
Best ResponseYou've already chosen the best response.0you have a 3 digit number so that you cannot use 0 on the first digit

Yuki
 5 years ago
Best ResponseYou've already chosen the best response.0so you multiply the number of digits you are allowed to plug in in each of the slots that you have.

Yuki
 5 years ago
Best ResponseYou've already chosen the best response.0in the first digit you are alloewd to plug in 9 numbers from 1 to 9

Yuki
 5 years ago
Best ResponseYou've already chosen the best response.0for the second and third, you have all digits, so 10 numers.

Yuki
 5 years ago
Best ResponseYou've already chosen the best response.0once you multiply all those numbers you have the answer
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