Question 1147057
how many numbers greater 250 can be formed using the digits 1,2,3,4 if no digit is to be repeated
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All the 4 digit #'s are > 250.
--> 4*3*2*1 = 24 4 digit #'s
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3 digit #'s must have 3 or 4 as the MSD.
--> 2*3*2*1 = 12 3 digit #'s
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24 + 12 = 36