1.

The value of 15C8 + 15C9 – 15C6 – 15C7 is(a) –1 (b) 0 (c) 1 (d) None of these

Answer»

Answer : (b) 0

15C8 + 15C915C615C7 

= 15C8 + 15C915C915C8          (∵ nCr = nCn–r

= 0



Discussion

No Comment Found