Consider the expansion of `(a+b+c+d)^(6)`. Then the sum of all the coefficients of the term Which contains a but not b is
Consider the expansion of `(a+b+c+d)^(6)`. Then the sum of all the coefficients of the term
Which contains a but not b is
A. 729
B. 3367
C. 665
D. 1024
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Correct Answer - C
Sum of coefficient which contains a but not b
`=` Number of ways of distributing six distinct object in three boxes (a,c,d)
- Number of ways of distributing siz distinct objects in to boxes `(c,d)`
`= 3^(6) - 2^(6) = 665`
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