JEE Mains · Maths · STD 12 - 13. probability
If the probability of hitting a target by a shooter, in any shot, is \(\frac{1}{3}\), then the minimum number of independent shots at the target required by him so that the probability of hitting the target at least once is greater than \(\frac{5}{6}\), is
- A \(3\)
- B \(6\)
- C \(5\)
- D \(4\)
Answer & Solution
Correct Answer
(C) \(5\)
Step-by-step Solution
Detailed explanation
\(1-\left(\frac{2}{3}\right)^{n}>\frac{5}{6}\) \(\left(\frac{2}{3}\right)^{n}<\frac{1}{6}\) \(\Rightarrow n=5\)
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