1.

Let setA = { 1, 2, 3, ….., 22}. Set B is a subset of AandB has exactly 11 elements, find the sum of elements of all possible subsets B .

Answer»

` 252^(21)C_(11) `
` 230^(21)C_(10) `
` 253^(21)C_(9) `
` 253^(21)C_(10) `

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