Area codes have three digits. The first digit must not be 0 or 1, the middle digit must be 0 or 1, and the last digit must not b

Question

Brrunno [24]

3 years ago

10

Area codes have three digits. The first digit must not be 0 or 1, the middle digit must be 0 or 1, and the last digit must not b

e 0. How many different area codes are possible?

Mathematics

1 answer:

disa [49] · Answer 1 · 2022-09-08T11:44:22+03:00

disa [49]3 years ago

4 0

There are 10 digits 0 1 2 3 4 5 6 7 8 9 if we can't use 0 and 1 then there are only 8 choices for the first digit and only 2 choices for the second digit and 10 for the third so there are 8*2*10 =160 possibilities. I think ???