Question

rank of the number 3241?(digits cannot be repeated)

Joshi sir comment

total numbers = 4*3*2*1 = 24

on arranging these numbers in order we get 1234

so rank = [24/4]*2+[6/3]*1+[2/2]*1+1 = 16

 

Read 1 Solution.

how did you mutliply with 2,1,1 in the solution..??

HARSHITH 11 year ago is this solution helpfull: 2 0

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