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JEE Main Mathematics question

MathematicsPermutations and CombinationsJEE Main

A lady gives a dinner party to guests to be selected from nine friends. The number of ways of forming the party of , given that two of the friends will not attend the party together is

Answer: (C)

Solution

Without restriction the guests can be chosen from friends in ways. Parties containing both of the two friends

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Question ID VK-020769