The number of ways of choosing 10 objects out of 31 objects of which 10 are identical and the remaining 21 are distinct, is : - DASH

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Question

The number of ways of choosing 10 objects out of 31 objects of which 10 are identical and the remaining 21 are distinct, is :

2²⁰ - 1

2²⁰

2²⁰ + 1

2²¹

Solution

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