What is the probability of getting at least one head when three unbiased coins are tossed together?
A1/8
B3/8
C7/8
D3/4
Explanation
Total outcomes = 2^3 = 8. Outcome with NO head = (T, T, T) [1 outcome]. Probability of at least one head = 1 – 1/8 = 7/8.
Exam Relevance
- Topic: Probability
- Subtopic: Coins
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