Permutations and Combinations: JEE Main 2025 Mathematics question

JEE Main 2025 · April, Unspecified (session-level dataset) · Q165

JEE Main 2025April, Unspecified (session-level dataset)MathematicsMediumPermutations and Combinations98× since 2002

Let

p

be the number of all triangles that can be formed by joining the vertices of a regular polygon

P

n

sides and

q

be the number of all quadrilaterals that can be formed by joining the vertices of

P

. If

p + q = 126

, then the eccentricity of the ellipse

\frac{x^2}{16} + \frac{y^2}{n} = 1

is:

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JEE Main 2025 Permutations and Combinations Question with Solution (April Unspecified (session-level dataset), Q165) | JEE Arc