Aptitude - Probability - Discussion
Discussion Forum : Probability - General Questions (Q.No. 5)
5.
Three unbiased coins are tossed. What is the probability of getting at most two heads?
Answer: Option
Explanation:
Here S = {TTT, TTH, THT, HTT, THH, HTH, HHT, HHH}
Let E = event of getting at most two heads.
Then E = {TTT, TTH, THT, HTT, THH, HTH, HHT}.
 P(E) = |
n(E) | = | 7 | . |
| n(S) | 8 |
Discussion:
121 comments Page 13 of 13.
Sundar said:
1 decade ago
Hi Guys,
At most two heads means "Total number of HEADs can be 0 to 2".
So we cannot include HHH, because it contains 3 heads.
But we can include TTT, because ZERO head is accepted.
Therefore, the given answers is perfectively correct.
You may ask your doubts here if you have regarding this question?
Have a nice day!
At most two heads means "Total number of HEADs can be 0 to 2".
So we cannot include HHH, because it contains 3 heads.
But we can include TTT, because ZERO head is accepted.
Therefore, the given answers is perfectively correct.
You may ask your doubts here if you have regarding this question?
Have a nice day!
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