If … and …, then the value of r is equal to :

Permutations and Combinations

JEE Main 2021 · 25 Jul, Evening shift · Q4830

MathematicsEasy98×since 2002Q4830

{}^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

MathematicsEasy98×since 2002Q4830

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

and

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

, then the value of r is equal to :