Mathematics · 2021
JEE Main · 4 August 2021, Shift 1 · Q78
Two players A and B play a game. Player A first throws a fair die and if 5 or 6 appears, he wins; otherwise player B throws a fair coin and wins if…
Two players A and B play a game. Player A first throws a fair die and if $\displaystyle 5$ or $\displaystyle 6$ appears, he wins; otherwise player B throws a fair coin and wins if head comes. The process continues till someone wins. The probability that B wins after completion of $\displaystyle 3$ or more throws of the die, is
Official answer
(1)
$\displaystyle \frac{1}{18}$
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JEE Main 2021 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.