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Q: Three unbiased coins are tossed. What is the probability of getting at most two heads ?

  • 1
    4/3
  • 2
    2/3
  • 3
    3/2
  • 4
    3/4
  • Show Answer
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Answer : 4. "3/4"
Explanation :

Answer: D) 3/4 Explanation: Let S be the sample space.Here n(S)= 23 = 8Let E be the event of getting atmost two heads. Then,n(E) = {(H,T,T), (T,H,T), (T,T,H), (H,H,T), (T,H,H), (H,T,H)}Required probability = n(E)/n(S) = 6/8 = 3/4.

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