The phone number area code must be a 3 digit
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Phone numbers consist of a three-digit area code followed by seven digits. If the area code must have a 0 or 1 for the second
digit, and neither the area code nor the seven-digit number can start with 0 or 1, how many different phone numbers are
possible? How did you come up with your answer?
a 8-10-10-8-10-10-10 10 10 10 = 6,400,000,000
b. 8-2-10-8-10 10 10 10 10 10 = 1,280,000,000
C. 8-2-10-8-10-10-10 10 10 - 128,000,000
d. 8-2-10-8-10-10-10 10 10 10 - 10 = 12,800,000,000
Please select the best answer from the choices provided
0 A
OB
oc
OD
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