If ⁿ P r = ⁿ P r + 1 and ⁿ C r = ⁿ C r - 1, then the value of r is equal to:

Permutations and Combinations: JEE Main 2021 Mathematics question

JEE Main 2021 · 25 Jul, Evening shift · Q4830

JEE Main 202125 Jul, Evening shiftMathematicsEasyPermutations and Combinations98× since 2002

{}^n{P_r} = {}^n{P_{r + 1}}

and

{}^n{C_r} = {}^n{C_{r - 1}}

, then the value of r is equal to :

JEE Main 2021 · 25 Jul, Evening shift · Q4830

JEE Main 202125 Jul, Evening shiftMathematicsEasyPermutations and Combinations98× since 2002

{}^n{P_r} = {}^n{P_{r + 1}}

and

{}^n{C_r} = {}^n{C_{r - 1}}

, then the value of r is equal to :