SOLUTION: How many two-digit numbers can be formed from the digits 2, 4, 6, 8, 9 if: no digit is repeated in any number? can you help me with this? thank you so much

Question 1173840: How many two-digit numbers can be formed from the digits 2, 4, 6, 8, 9 if:
no digit is repeated in any number?
can you help me with this? thank you so much
Answer by ikleyn(52908) (Show Source): You can put this solution on YOUR website!
.


You can place any of the 5 digits to the first ("tens") position.


Since repetition is not allowed, you can place any of remaining 4 digits to the last ("ones") position.


By doing this way, you obtain  5*4 = 20 different 2-digit numbers.

Solved and explained.

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