JEE MATHEMATICS MCQ: PERMUTATIONS

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A class has

n

students. We have to form a team of the students including atleast two students and also excluding atleast two students. The number of ways of forming the team is

View answer and explanation

Correct option: B

2^n-2 n-2

Option C (

2^n-2 n-4

) is correct because it represents the total number of subsets minus the subsets with fewer than two students and the subsets with fewer than two students excluded.

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How many different nine digit numbers can be formed from the number 223355888 by rearranging its digits so that the odd digits occupy even positions? The number of ways in which

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\left( {m + n} \right)

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n

at another. The number of ways of arranging the guests is