defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Mathematics Permutations and Combinations

The number of ordered pairs (r, k) for which 6 ⋅ 35Cr = (k2 − 3) ⋅ 36Cr+1 , where k is an integer, is :

1
4
2
6
3
2
4
3
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