UPSC NDA Math Model Paper 2

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Question : 78 of 120

Marks: +1, -0

If (

15

8

)+(

15

7

)=(

n

r

), then the values of n and r are:
Where, (

n

r

)=‌nCr

16 and 7.
16 and 8.
16 and 9.
30 and 15.

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