Mathematics · 2013
JEE Main · 9 April 2013, Shift 1 · Q74
The probability of a man hitting a target is 2/5. He fires at the target k times (k, a given number). Then the minimum k, so that the probability of…
The probability of a man hitting a target is $\displaystyle \frac{2}{5}$. He fires at the target k times (k, a given number). Then the minimum k, so that the probability of hitting the target at least once is more than $\displaystyle \frac{7}{10}$, is :
Official answer
(1)
$\displaystyle 3$
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JEE Main 2013 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.