SOLUTION: how many 5 digit even number greater than 40000 that can be obtained using the digit 1,2,4,5,7,8 if repetition of digit is allowed?

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Question 1094837: how many 5 digit even number greater than 40000 that can be obtained using the digit 1,2,4,5,7,8 if repetition of digit is allowed?
Answer by ikleyn(52777) About Me  (Show Source):
You can put this solution on YOUR website!
.
4*6*6*6*3 numbers.


Any of digits 4, 5, 7, 8 in the 1-st (leftmost) position:  4 choices.

Any of digits  1, 2, 4, 5, 7, 8  in the 2-nd position:     6 choices.

Any of digits  1, 2, 4, 5, 7, 8  in the 3-rd position:     6 choices.

Any of digits  1, 2, 4, 5, 7, 8  in the 4-th position:     6 choices.

Any of digits  2, 4, 8           in the 5-th position:     3 choices.

You calculate the answer.