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OpenStudy (anonymous):
help with .. if no digit appears more than once how many 5digit numbers can be formed from 2,3,4,6,7
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OpenStudy (anonymous):
120?
OpenStudy (anonymous):
For the first position there are 5 numbers you can pick from. For the second there are 4, and so on. So the total number of different ways you can pick them is 5*4*3*2*1 = 120.
OpenStudy (anonymous):
thanks
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