College of Admission Tests Multan

Probability

Solve the question of and select the option from the choices A through D/E. Check your Answer and view the explanation.

Question: 2

Two unbiased coins are tossed. What is probability of getting at most one tail ?
  • 1/2
  • 1/3
  • 3/2
  • 3/4

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Correct Answer: D

Total 4 cases = [HH, TT, TH, HT]

Favourable cases= [HH, TH, HT]

Please note we need atmost one tail, not atleast one tail.

So probability = 3/4