Multiple choice

Three unbiased coins are tossed together. Find the probability of getting all heads.

  1. $ \dfrac{3}{8}$
  2. $ \dfrac{1}{8}$
  3. $ \dfrac{1}{4}$

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Total outcomes for 3 coins = 2^3 = 8. Outcomes are {HHH, HHT, HTH, THH, HTT, THT, TTH, TTT}. Only HHH is all heads. Probability = 1/8.

AI explanation

When three coins are tossed, the total number of possible outcomes is 2 cubed, which equals 8. Getting all heads is only one specific outcome out of these 8 possibilities, so the probability is 1/8.

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