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Ask iit jee aieee pet cbse icse state board experts Discussion Response Post to: P n C challenge
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uday_zingtudor (931)

Blazing goIITian

Olaaa!! Perrrfect answer. 155  [233 rates]

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Hey in ur second question,

No couple must play in the same game means the wife and hubby should be neither on the same nor on the opposite side.

Select two wives from the total 5 in 5C2  ways.Now u can't select their hubbies.So u can select only 3 of them in 3C2 ways.Now u can interchange the couples selected for match.So multiply by 2.

So 5C2 x 3C2 x 2 = 60

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