SOLUTION: How many two-digit numbers can be formed from the digits 2, 4, 6, 8, 9 if:
repetitions are allowed?
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:
repetitions are allowed?
can you help me with this? thank you so much
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Question 1173841: How many two-digit numbers can be formed from the digits 2, 4, 6, 8, 9 if:
repetitions are allowed?
can you help me with this? thank you so much Answer by ikleyn(52914) (Show Source):
You have 5 digits.
You can place any of these 5 digits to the first ("tens") position.
Since repetition is allowed, you can place any of these 5 digits to the last ("ones") position.
By doing this way, you obtain 5x5 = 25 different pairs of digits.
Each pair defines a unique 2-digit number.
Different pairs define different numbers.
Therefore, 25 different 2-digit numbers can be obtained. ANSWER
