Three unbiased coins are tossed. What is the probability of getting at most two heads?
- A. 3/(4)
- B. 1/(4)
- C. 3/(8)
- D. 7/(8)
✅ Correct Answer: 7/(8)
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}. [https://www.indiabix.com/_files/images/aptitude/1-sym-tfr.gif] P(E)=n(E)/(n(S))=
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