hainy
if no digit appears more than once how many 5digit numbers can be formed from the digits 2,3,4,6,and7?



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lgbasallote
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2 3 4 6 7 has 5 numbers so im thinking 5!

ParthKohli
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There are 5 slots for first
4 for second
3 for third
2 for fourth
1 for the last.
5! is the answer.

ParthKohli
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5! as in 5 factorial

DHASHNI
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dw:1338343838103:dw

lgbasallote
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5! = 5 x 4 x 3 x 2 x 1
not 5 with exclamation point jsyk :S

DHASHNI
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its not exclamation !!!!!
i m writing it in mathematical form
its called factorial
:P

hainy
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okay thanks everyone