Two coins are tossed together. What is the probability of getting at most one tail?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → \(\frac{3}{4}\)
Two coins give four equally likely outcomes: HH, HT, TH, TT. “At most one tail” means zero or one tail.
Favourable outcomes: HH (no tail), HT and TH (one tail), that is, 3
Probability \(=\frac{3}{4}\)
Shortcut: The only outcome left out is TT, so the probability is \(1-\frac{1}{4}=\frac{3}{4}\).