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WAEC Further Mathematics 2014 Question 26

Question 26

Probability

If a fair coin is tossed four times, what is the probability of obtaining at least one head?

  1. A.½
  2. B.¼
  3. C.13/16
  4. D.15/16
Show the answer and explanation

Answer: D (15/16)

Explanation

P(no head) = (½)⁴ = 1/16, so P(at least one) = 15/16.