JEE Main2019Math
Q.
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 :
- A
5
- B
2
- C
4
- D
3
Solution
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 :
5
2
4
3