A fair coin is tossed 5 times. What is the probability of getting at least one head?
Answer and explanation
Correct answer: A.
- Step 1: The complement of 'at least one head' is 'all tails', with probability .
- Step 2: .
Answer
.
Why not the others: : that is the probability of no heads. : it counts only one head. : it ignores the number of tosses.
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