Two fair coins are tossed. What is the probability of getting two heads?
Answer and explanation
Correct answer: A.
- Step 1: The outcomes are , which are equally likely outcomes.
- Step 2: Only is favourable, so .
Answer
.
Why not the others: is what you get if you treat it as one toss. is what you get if you count the outcomes as three. is what you get if you give the probability of at least one head.
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