A set P has 20 elements . The no. of subsets of P containing odd no. of elements is _ a. 2^(18) + 20 b. 2^(20) -128 c.2^(19) d.2^(19) -1
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7 Answers
- a set P has 20 elements . The no.of subsets of P containing odd no.of elements is -
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2^(n-1)-1 formula