In a different plan for area codes, the first digit could be any number from 4 through 7, the second digit was either 2, 3, or

Question

3 years ago

8

4, and the third digit could be any number except 0 . With this plan, how many different area codes are possible?

1 answer:

adell [148] · Answer 1 · 2022-08-30T04:16:24+03:00

8 0

1st digit:: 3ways
2nd digit:: 3ways
3rd digit:: 9 ways

3x3x9=81

So the answer is 81 different possible area codes.

In a different plan for area​ codes, the first digit could be any number from 4 through 7​, the second digit was either 2, 3, or