JEE Main 2026 — Probability Question with Solution
JEE Main 2026 (21 January Shift 2)
Question
A random variable takes values with probabilities respectively, where . Let and respectively be the mean and standard deviation of X such that . Then is equal to :
Choose an option
Show full solutionCorrect option: C
Correct answer
C
Step-by-step explanation
Sum of probabilities : .
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This is a previous-year question from JEE Main 2026, covering the Probability 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.