JEE Main 2019 Mathematics question
The minimum number of times one has to toss a fair coin so that the probability of observing at least one head is at least 90% is:
Answer: (A)
Solution
⇒ n ≥ 4.
The minimum number of times one has to toss a fair coin so that the probability of observing at least one head is at least 90% is:
⇒ n ≥ 4.