Posted by **Lisa** on Friday, January 18, 2008 at 11:03pm.

from the digits 0,1,2,3,4,5,6,7,8,9 find the number of

a) 4-digit numbers with repetition of digits

b) 4-digit numbers without repetition of digits

c) the number of odd 4-digit numbers with no repetition of digits

d) the number of even 4-digit numbers with no repetition of digits

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