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Mathematics 19 Online
OpenStudy (anonymous):

How many difference 3-digit even numbers can be formed from the digits 2,3,5,7 and 9, if each digit can be used more than once?

OpenStudy (anonymous):

first choice you have 4, second you have 4, third you have only one choice (a 2) so the answer is 16

OpenStudy (anonymous):

the answer would be \[5^{3}\]=125 combinations if each one of them can repeat

OpenStudy (anonymous):

First number you have 5 choices, second number you have 5 choices, but for the last you only have one (the 2 to make it even). So 5*5*1 = 25.

OpenStudy (anonymous):

Lol so which one is it

OpenStudy (anonymous):

what are the 5 choices?

OpenStudy (anonymous):

the 5 digits you can pick from. First digit can be a 2, 3, 5, 7, or 9 (5 choices) Second digit can be a 2, 3, 5, 7, 0 (5 choices) last digit can only be a 2 (one choice)

OpenStudy (anonymous):

thank you

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