Mathematics
Three unbiased coins are tossed together. What is the probability of getting at least two heads?
Probability
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Answer
When three coins are tossed together, the possible outcomes are: {(H, H, H), (H, H, T), (H, T, H), (T, H, H), (H, T, T), (T, H, T), (T, T, H), (T, T, T)}
Total number of outcomes = 8
Let E be the event of getting at least two heads,
E={(H, H, H), (H, H, T), (H, T, H), (T, H, H)}
The number of favorable outcomes to the event E = 4
∴ P(E) =
Hence, option 1 is the correct option.
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