Jee Main
Permutations And Combinations
JEE Main 2021 (Online) 25th July Evening Shift
MCQ+4 / -12021
If \({}^n{P_r} = {}^n{P_{r + 1}}\) and \({}^n{C_r} = {}^n{C_{r - 1}}\), then the value of r is equal to :
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