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Question Number 135634 by oustmuchiya@gmail.com last updated on 14/Mar/21

Answered by physicstutes last updated on 14/Mar/21

$$\left(i\right)n\left(B\right)=8+5+x-4=11+x$$$$n(B\cup C)=8+x-4+5+2y=9+x+2y$$$$\Rightarrow 11+x=9+x+2y\Rightarrow 2=2y\Rightarrow y=1$$$$\left(ii\right)n\left(C\right)=5+2y$$$$\mathrm{and}n\left(A\right)=15$$$$\Rightarrow 5+2y=15\Rightarrow 2y=10,y=5\left(\mathrm{error}\mathrm{in}\mathrm{question}\mathrm{as}\mathrm{there}\mathrm{is}\mathrm{inconsistency}\right)$$$$$$

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