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JEE Mains · Maths · STD 12 - 13. probability

एक न्याय सिक्के को न्यूनतम कितनी बार उछालें कि कम से कम एक चित्त आने की प्रायिकता \(99 \%\) से अधिक हो ?

  1. A \(8\)
  2. B \(6\)
  3. C \(7\)
  4. D \(5\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(7\)

Step-by-step Solution

Detailed explanation

\({1-\left(\frac{1}{2}\right)^{n}>\frac{99}{100}} \) \({\Rightarrow\left(\frac{1}{2}\right)^{n}<\frac{1}{100}} \) \({\Rightarrow n=7}\)
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