Multiple choice

Three coins are tossed, then what is the probability that at least two heads appears on upper face?

  1. $\dfrac { 5 }{ 8 } $
  2. $40$
  3. $\dfrac { 8 }{ 5 } $

  4. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Total outcomes for 3 coins = 2^3 = 8. Outcomes with at least two heads: HHH, HHT, HTH, THH. Total = 4. Probability = 4/8 = 1/2. Since 1/2 is not listed, 'None of these' is correct.

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