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Grade: 12th pass

                        

If c 0 +c 1 +c 2 +.........+c n =256,then 2n c 2 is equal to A... 56 B...120 C...28 D...91

2 years ago

Answers : (1)

Aditya Gupta
2068 Points
							
we know that c0+c1+c2+.........+cn= 2^n
so, 2^n=256=2^8
or n=8
so, 2nc2 = 16C2= 120, so option B is correct 
2 years ago
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