JEE Main 2021MathematicsBinomial TheoremMultinomial TheoremmediumNumerical

JEE Main 2021 — Binomial Theorem Question with Solution

From: JEE Main 2021 (Online) 31st August Evening Shift

Question

If the coefficient of a7b8 in the expansion of (a + 2b + 4ab)10 is K.216, then K is equal to _____________.

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Show full solutionCorrect answer: 315
Correct answer
315

Step-by-step explanation





..... (1)

.... (2)

..... (3)







so coefficients =



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About this question

This is a previous-year question from JEE Main 2021, covering the Binomial Theorem chapter of Mathematics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.