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OpenStudy (anonymous):
Please help, I'll give you a medal. How many 2-digit numbers can be formed by using only the digits, 2,3,5, and 6 if the digits are not be repeated within a number. A.11 B.12 C.10 D.2
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OpenStudy (ajanijones):
Its C.
OpenStudy (ajanijones):
can I have medal
OpenStudy (anonymous):
It is 12, if you count manually, so I would go with B
OpenStudy (anonymous):
its b
OpenStudy (anonymous):
explaination: every digit out of the four given digits can be combined with three other digits to form a two digit number. So there are a total of 3 * 4 = 12 possible numbers
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OpenStudy (anonymous):
you can also solve it by using the combinations formula..
OpenStudy (anonymous):
its B fo sho
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