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I : IF ""^(12)C(r+1) ="" ^(12) C(3r-5...

I : IF ` ""^(12)C_(r+1) ="" ^(12) C_(3r-5) ` then r=3 or 4 .
II : If ` ""^(9) C_(3) +""^(9)C_(5) = ""^(10)C_(r)` then r=4 or 6.

A

Only 1 is ture

B

only II is true

C

Both I and II are true

D

neither a nor II true

Text Solution

Verified by Experts

The correct Answer is:
C
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