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Is that your final answer? Because that's a huuuuuuge number.

One question: does the distribution of marks matter within each section?

I think not... that would make the question way too heavy.

answer given in book is \(C.)\)

I think the distribution of marks doesn't matter within each section

No

I have leant stars ans bars , multinomial is not in my sylabus

Basically I'm asking how you've been taught to do that.

Which is why the coefficient of \(x^2\) tells you the number of solutions, right? :)

i need to go ,bcuz battry is down, i will read ur expln later

Therefore, the number of solutions is \(3\).

it equals 64906

Yeah, exactly.

that wolfram page is too technical for noob like me

i think the answer should be none of these

if the book says the answer is 64906, then the question is worded incorrectly.
(not the first time)

notice that 93C3 is related to 90 stars and 3 bars problem

yea i dont trust the book

93C3= number of non -negative solns of a+b+c+d=90

i have studied a+b+c+d=90 kinds of problems its just a coincidence i related to it

ok thnks