The number of ways of choosing 10 objects out of 31 objects of which 1 – McqOptions

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1.	The number of ways of choosing 10 objects out of 31 objects of which 10 are identical and the remaining 21 are distinct, is:
A.	220-1
B.	221
C.	220
D.	220+1
Answer» D. 220+1

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