""^15C8+""^15C9-""^15C6-""^15C7=...

`""^15C_8+""^15C_9-""^15C_6-""^15C_7`=

A

1

B

2

C

0

D

None of these.

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""^15C_0.""^5C_5+""^15C_1.""^5C_4+""^15C_2.""^5C_3+ ""^15C_3.^5C_2+""^15C_4.""^5C_1 equals :

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If |{:(.^(9)C_(4),.^(9)C_(5),.^(10)C_(r)),(.^(10)C_(6 ),.^(10)C_(7),.^(11)C_(r+2)),(.^(11)C_(8),.^(11)C_(9),.^(12)C_(r+4)):}|=0 , then the value of r is equal to

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MODERN PUBLICATION-BINOMIAL THEOREM-EXERCISE

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Every body in a room shakes hand with every body else. The total numbe...
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