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 7 of 13.
Shubham said:
9 years ago
Here they've taken 3 coins for example. Why not 2 coins?
Dhamodar said:
9 years ago
Why include TTT?
Zaid said:
9 years ago
Why we taken event 7?
Asef rafi said:
9 years ago
What is an unbiased coin?
A.kalai said:
9 years ago
Can you clear my doubt regarding mean and variance?
Siddhi said:
9 years ago
Well explained @Sundar.
HARINI said:
9 years ago
s = {HHH,HHT,HTH,HTT,THT,TTH,TTT}
S(N) = 8.
LET A = GETTING AT MOST 2 HEADS.
(MAX 2 HEADS;MIN 1HEADS OR 0 HEADS)
A ={HHT,HTT,THH,HTT,THT,TTH,TTT}
N(A) = 7,
P(A) = 7\8.
S(N) = 8.
LET A = GETTING AT MOST 2 HEADS.
(MAX 2 HEADS;MIN 1HEADS OR 0 HEADS)
A ={HHT,HTT,THH,HTT,THT,TTH,TTT}
N(A) = 7,
P(A) = 7\8.
Shah Rukh said:
9 years ago
Biased means neither head nor tail.
Unbiased means opposite to biased. i.e It will be in perfect outcomes.
Unbiased means opposite to biased. i.e It will be in perfect outcomes.
Sujith Remigius said:
9 years ago
Thank you @Sundar.
Praveen said:
9 years ago
Give the sample space of the given problem.
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