The number of ways of choosing 10 objects out of 31 objects

eSaral Updated on:
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 :

  1. $2^{20}$

  2. $2^{20}-1$

  3. $2^{20}+1$

  4. $2^{21}$

Correct Option: 1

Solution:

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