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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

  1. A \(3\)
  2. B \(6\)
  3. C \(5\)
  4. D \(4\)
Verified Solution

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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