How many phone numbers are possible in the (770) area code if:
For the form ABC-, A is r...
Mathematics, 14.10.2020 14:01 gonzalesalexiaouv1bg
How many phone numbers are possible in the (770) area code if:
For the form ABC-, A is restricted to numbers 2-9. B, C, and X can be any digit 0-9. Also, the number 867-5309 is not used.
A. 6,999,999
B. 7,000,000
C. 7,999,999
D. 8,000,000
Answers: 3
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