36btw does this sign represents....
(nr) ????? i hvn't understood till date... !!
\hspace{-16}$Find all Integer pairs $\mathbf{(n,r)}$ for which $\mathbf{\binom{n}{r}=120}$
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3 Answers
36
3@rahul.
this means the number of combinations of n thing taen r at a time.
you will do it in class 11.
C(n,r) = (n!)/(r!*(n-r)!)
here C(n,r) means the same as the given symbol by man111.
