engineering recuitment AAI ATC Junior Executive 2025 Mock Test Series Mathematics Permutations and Combinations
There are n points in a plane, in which m points are collinear. Let Tn,m denotes the number of different straight lines which can be formed with the given points as vertices. If Tn+1,m+1 - Tn,m = 19, then the value of m - n is
1
19
2
22
3
25
4
17