Probability Puzzles
Hard
1 min
Two fair coins are tossed. What is the probability of getting exactly one head?
Hint
List all four equally likely outcomes.
Answer
1/2.
Explanation
The outcomes are HH, HT, TH and TT. Exactly one head occurs in HT and TH, giving 2 out of 4.
Step-by-Step Solution
Outcomes = HH, HT, TH, TT.
Favourable = HT, TH.
Probability = 2/4 = 1/2.
Favourable = HT, TH.
Probability = 2/4 = 1/2.