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Aptitude | Probability | Question 1

  • Difficulty Level : Expert
  • Last Updated : 28 Jun, 2021

Given a coin which gives HEADS with probability 1/4 and TAILS with 3/4. The coin is tossed k times. What is the probability that we get at least k/2 HEADS is less than or equal to?
(A) (1/2) k/5
(B) (1/2) k/2
(C) (1/3) k/2
(D) (1/5) k/2

Answer: (A)

Explanation: probability


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