JEE Main 2025 — Probability Question with Solution
From: JEE Main 2025 (Online) 22nd January Morning Shift
Question
A coin is tossed three times. Let denote the number of times a tail follows a head. If and denote the mean and variance of , then the value of is:
Choose an option
Show full solutionCorrect option: D
Correct answer
D48
Step-by-step explanation
| Outcome | ||
|---|---|---|
| HHH | 0 | |
| TTT | 0 | |
| HHT | 1 | |
| HTH | 1 | |
| THH | 0 | |
| TTH | 0 | |
| THT | 1 | |
| HTT | 1 |
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This is a previous-year question from JEE Main 2025, 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.