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Flag Algebra> If c 0 +c 1 +c 2 +.........+c n =256,then...
question mark

If c0+c1+c2+.........+cn=256,then 2nc2 is equal to
A... 56
B...120
C...28
D...91

Rudranil Basak , 7 Years ago
Grade 12th pass
anser 1 Answers
Aditya Gupta
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 
Last Activity: 7 Years ago
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