Nathanial Levine

2022-10-03

How many different phone numbers are possible in the area code 928? Note: Phone numbers cannot start with 0 or 1.

Paige Paul

Beginner2022-10-04Added 11 answers

Phone number consists of 10 digits. Out of 10 digits, first three are area code. Rest 7 digits are phone number.

The first digit of 7 digits phone numbers cannot be 0 or 1 so first digit can be selected in 8 ways. Rest each of the six digits can be selected in 10 ways. So possible number of different phone numbers is

$8\cdot 10\cdot 10\cdot 10\cdot 10\cdot 10\cdot 10=8000000$

The first digit of 7 digits phone numbers cannot be 0 or 1 so first digit can be selected in 8 ways. Rest each of the six digits can be selected in 10 ways. So possible number of different phone numbers is

$8\cdot 10\cdot 10\cdot 10\cdot 10\cdot 10\cdot 10=8000000$

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