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JEE Main 2022 · MathsMultiple choiceSingle correctMediumMulti-step

JEE Main 25 July 2022, Shift 1, Maths Q16

Question 16 of 90 in this shift, Maths question 16 of 30, Section A.

If the sum and the product of mean and variance of a binomial distribution are

24

and

128

respectively, then the probability of one or two successes is :

(1) $\frac{33}{2^{32}}$
(2) $\frac{33}{2^{29}}$
(3) $\frac{33}{2^{28}}$ Official answer
(4) $\frac{33}{2^{27}}$

Official answer

Option 3

NTA final key (2022 Session 2).

Chapter: Probability
Topic: No close match in our taxonomy
Idea tested: No close match in our taxonomy

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.