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NDA 2023
Exam
NDA
Year
2023
Subject
Mathematics
Chapter
Probability

NDA 2023 · Mathematics · Probability

A fair coin is tossed 6 times. What is the probability of getting a...

A fair coin is tossed 6 times. What is the probability of getting a result in the 6th toss which is different from those obtained in the first five tosses?

Options

  1. A716\frac{7}{16}
  2. B116\frac{1}{16}
  3. C132\frac{1}{32}
  4. D164\frac{1}{64}

Correct answer

C. 132\frac{1}{32}

Step-by-step solution

Let E={HHHHHT,TTTTTH}\mathrm{E}=\{\mathrm{HHHHHT}, \mathrm{TTTTTH}\} Now, P(E)=226=264=132P(E)=\frac{2}{2^6}=\frac{2}{64}=\frac{1}{32}
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