Question

find the number of proper subsets of W={5, 6,7}​

Answer 1

Answer:

Given,A={1,2,3,4,5,6}. Then n(w)=6 no.of subsets=n[p(w)]=2 power6=64 then no.of proper subsets = n[p(w)]-1=2 power 6–1=64–1=63

Answer 2

Answer:

w= 18

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