1 votes 1 votes Set Theory & Algebra counting set-theory&algebra + – biranchi asked Jan 24, 2017 biranchi 335 views answer comment Share Follow See all 2 Comments See all 2 2 Comments reply dd commented Jan 24, 2017 reply Follow Share https://gateoverflow.in/94195/probability-settheory -- $\begin{align*} &\text{No of unordered disjoint pairs including empty sets} = \left [ \frac{3^n-1}{2} +1 \right ] \\ &\Rightarrow \text{No of non-empty unordered disjoint subset pairs } = \left [ \frac{3^n-1}{2} +1 \right ] - 2^{n} \\ &\Rightarrow 28501 \end{align*}$ Comment If wrong 1 votes 1 votes Sushant Gokhale commented Jan 24, 2017 reply Follow Share @Debashish. Perfectly correct 0 votes 0 votes Please log in or register to add a comment.