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PERMUTATION COMBINATION

Posted by anurag sharma

Try to solve this question and will definately change your perception towards p&c.
Q-A set contains 5 natural numbers as {1,2,3,4,5}.what will be the sum of all the possible five digit numbers which we can make from the given set.

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4 Responses to "PERMUTATION COMBINATION"

ramtajogi (visit their site)

ANS: 4! X 166665

 
:) (visit their site)

The answer is 3999960.

(1+2+3+4+5)*10000*24 = 3600000
(1+2+3+4+5)*1000*24 = 360000
(1+2+3+4+5)*100*24 = 36000
(1+2+3+4+5)*10*24 = 3600
(1+2+3+4+5)*1*24 = 360
------------------------------
Sum = 3999960

 
Narsi (visit their site)

But the above answers are for sum of all possible 5-digit numbers with distinct digits.

 
Narsi (visit their site)

If numbers with repetitive digits are possible, then the sum will be 625*166665 = ((5 to the power 4)*11111*(1+2+3+4+5))

 

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