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If A and B are two sets such that A has 12 elements, B has 17 elements,and AUB has 21 elements, how many elements does A B have ?22. ;fn S vkSj T ,sls nks leqPp; gks fd S ds 21 ds 32 vkSj ds 11 vo;ogS] rks crkb, fd ds fdrus ds fdrus vo;o gSa \If S and T are two sets such that S has 21 elements, T has 32 elements,and S Ç T has 11 elements, how many elements does S U T have ?23. ;fn X vkSj Y ,sls nks leqPp; gksa fd X ds 40, ds 60 vkSj ds10 vo;o gSA rks crkb, fd Y ds fdrus vo;o gSa \If X and Y are two sets such that X has 40 elements, X U Y has 60elements and X Ç Y has 10 elements, how may elements does Y have ?24. ;fn A vkSj B nks vla;qDr leqPp; gksarks fl) dhft, fdIf A and B are disjoint sets, show thatSX∩∪TYn (AUB) = n (A) + n (B)25. 70 O;fDr;ksa ds ,d lewg esa 37 dkQh ilan djrs gSa] 52 pk; ilan djrs gSA vkSjizR;sd O;fDr nksuksa is;ksa esa ls de ls de ,d is; vo'; ilan djrk gSA crkb,fd fdrus O;fDr dkQh vkSj pk; nksuksa ilan djrs gSa\In a group of 70 people, 37 like coffee, 52 like tea and each person likesat least one of the two drink. How many people like both coffee and tea ?26. 70 O;fDr;ksa ds ,d lewg esa] 40 O;fDr fØdsV ilan djrs gS] 10 O;fDr fØdsVvkSj Vsful nksuksa ilan djrs gSA crkb, fd fdrus dsoy Vsful ¼fdØsVugha½ ilan djrs gS \ fdrus Vsful ilan djrs gS \In a group of 60 people, 40 like cricket, 10 like both cricket and tennis.How many like tennis only and not cricket ? How many like tennis ?(21)