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49 members attend the party.in that 22 are males,17 are females.the shake hands between males,fenales,males and females.then what is the order of their settings

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a metal strip of width x cm.2 metal strips are placed one over the other,then the combined length of 2 strips is y.if z strips are placed in that manner.what is the final width of that arrangement 33 people {al, a2, .... a33} meet and shake hands in a circular fashion. In other words, there are totally 33
handshakes involving the pairs, {al, a2}, {a2, a3), .... {a32, a33), {a33, al). Then the size of the smallest set of
people such that the rest have shaken hands with at least one person in the set is