JEE Novice - (7)
Discrete Mathematics
Level
3
\[\Large {n \choose r-1} : {n \choose r} : {n \choose r+1} = 2:4:5 \]
If positive integers \(n,r\) satisfy the ratio above , find the value of \(n+r\).
This question is a part of JEE Novices.
by
Nihar Mahajan