Multiple choice

The probability of getting at least two heads when tossing a coin three times is

  1. $\dfrac{1}{4}$
  2. $\dfrac{1}{3}$
  3. $\dfrac{1}{2}$
  4. $\dfrac{1}{8}$
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C Correct answer
Explanation

Total outcomes for 3 coin tosses is 2^3 = 8. Outcomes with at least two heads are HHH, HHT, HTH, THH. There are 4 such outcomes. Probability = 4 / 8 = 1/2.

AI explanation

Tossing a coin three times creates 2 cubed, or 8, total possible outcomes. Getting at least two heads includes the specific outcomes of exactly two heads and exactly three heads, which are HHT, HTH, THH, and HHH, making 4 favorable outcomes. The probability is calculated as 4 divided by 8, resulting in 1/2.

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