Recent questions tagged subsets

A set contains $2n+1$ elements. The number of subsets of the set which contain at most $n$ elements is$2^n$$2^{n+1}$$2^{n-1}$$2^{2n}$

Which one of the following statements is correct regarding the elements and subsets of the set $\{1, 2, \{1, 2, 3\}\}$?$\{1, 2\} \in \{1, 2, \{1, 2, 3\} \}$$\{1, 2\} \sub...

QuestionIf A and B are subsets of set X = { 1,2,3, ... 99,100 } and A # B denote the set of all elements of X which belogs to exactly A or B . Total number of subsets o...