If ^ 12 P_ r = ^ 11 P_ G +6^ 11 P_ 5 , then f is equal to :
Mathematics · JEE Main · NTA Exams — Permutations and Combinations
If \({ }^{12} P_{r}={ }^{11} P_{G}+6^{11} P_{5}\), then \(\text { f }\) is equal to :
- 5
- 6
- 7
- None of these
Answer
(B) 6
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