Minimum number of times a fair coin must be tossed so that the probability of getting at least one head is more than 99% is

Engineering

Mathematics

Binomial Probability Theorem

Question

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$1 - {(\frac{1}{2})}^{n} > \frac{99}{100}$

$\Rightarrow {(\frac{1}{2})}^{n} < \frac{1}{100}$

⇒ n = 7