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
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-> 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
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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(52884) (Show Source):
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.
