Permutations and Combinations: JEE Main 2021 Mathematics question

JEE Main 2021 · 1 Sep, Evening shift · Q4763

JEE Main 20211 Sep, Evening shiftMathematicsMediumPermutations and Combinations98× since 2002

Let P₁, P₂, ......, P₁₅ be 15 points on a circle. The number of distinct triangles formed by points P_i, P_j, P_k such that i +j + k

\ne

15, is :

JEE Main 2021 · 1 Sep, Evening shift · Q4763

JEE Main 20211 Sep, Evening shiftMathematicsMediumPermutations and Combinations98× since 2002

Let P₁, P₂, ......, P₁₅ be 15 points on a circle. The number of distinct triangles formed by points P_i, P_j, P_k such that i +j + k

\ne

15, is :

More on Permutations and Combinations