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JEE MATHEMATICS MCQ: COMBINATIONS

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A lady gives a dinner party to 5 guests to be selected from nine friends. The number of ways of forming the party of 5, given that two of the friends will not attend the party together is

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Correct option: C

91

Option C (91) is correct because it calculates the total number of ways to choose 5 guests from 9, then subtracts the number of ways where the two friends are both included.

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n