SOLUTION: how many four digit codes can be formed using the digits 0,1,2,3,4,5,6,7,8,9 if the last digit cannot be 0 or 1 or 2 and repetition of digits is allowed?

Question 1026685: how many four digit codes can be formed using the digits 0,1,2,3,4,5,6,7,8,9 if the last digit
cannot be 0 or 1 or 2 and repetition of digits is allowed?
Answer by ikleyn(52787) (Show Source): You can put this solution on YOUR website!
.
how many four digit codes can be formed using the digits 0,1,2,3,4,5,6,7,8,9 if the last digit
cannot be 0 or 1 or 2 and repetition of digits is allowed?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

= 7000.

Any of 10 digits in the first position;
any of 10 digits in the second position;
Any of 10 digits in the third position,
and any of 7 digits (from 3 to 9) in the fourth position.

It gives that answer.

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