Subsets
Level
pending
Find the number of proper subsets in set(a,b,c,d,e,f,g,h,i,j,k,l,m, ... ,z)
The answer is 67108863.
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1 solution
the formula for proper subsets is 2^n-1. n is is for the number of elements. 2^n is to find the subset and you subtract one to remove the empty set(improper subset). So 2^26 is 67108864 and you subtract one so you get 67108863.