Mathematics, 14.01.2022 06:50 colebuug9
The telephone extensions at a company use 4 digits.
a. How many extensions are possible if there are no restrictions?
b. How many extensions are possible if the first digit cannot be 0 or 9?
c. How many extensions are possible if the first digit can only be 1?
Pls help with c
Answers: 3
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The telephone extensions at a company use 4 digits.
a. How many extensions are possible if there a...
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