📢 Too many exams? Don’t know which one suits you best? Book Your Free Expert 👉 call Now!
  • google app store apple app store
    • ✖

      Question

      Three fair coins are tossed simultaneously. Find the

      probability that at least two heads appear.
      A 3/4 Correct Answer Incorrect Answer
      B 2/5 Correct Answer Incorrect Answer
      C 1/2 Correct Answer Incorrect Answer
      D 5/7 Correct Answer Incorrect Answer

      Solution

      Sample space of three coins: 2³ = 8 outcomes. List outcomes (H = head, T = tail): HHH HHT HTH THH HTT THT TTH TTT “At least two heads” means 2 or 3 heads. Count favourable outcomes: Exactly 2 heads: HHT, HTH, THH → 3 outcomes Exactly 3 heads: HHH → 1 outcome Total favourable = 3 + 1 = 4 Probability = favourable / total = 4 / 8 = 1 / 2 Answer: 1/2.

      Practice Next
      More Probability Questions
      ask-question