Questions
The number of ways in which 30 marks can be alloted to 8 questions if each question carries at least 2 marks, is
a
115280
b
117280
c
116280
d
None of these
detailed solution
Correct option is C
Required number = coefficient of x30 in (x2 + x3 + … + x16)8 = coefficient of x30 in x161+x+…+x148= coefficient of x14 in 1−x151−x8= coefficient of x14 in (1−x)−8=21C14=116280Talk to our academic expert!
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