SOLUTION: A local telephone number in an office is given by a sequence of three digits. How manydifferent telephone numbers are there if the first digit cannot be 0? Select one: a. 27 b.

Question 1113019: A local telephone number in an office is given by a sequence of three digits. How
manydifferent telephone numbers are there if the first digit cannot be 0?
Select one:
a. 27
b. 1000
c. 900
d. 30
Answer by ikleyn(52786) (Show Source): You can put this solution on YOUR website!
.

9*10*10 = 900.


Any of 9 digits in the first position;

Any of 10 digits in the second position,

and any of 10 digits in the third position.

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