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A fair coin is tossed three times in succession. If the first toss produces a head, then the probability of getting exactly two heads in three tosses is
  • a)
    1/8
  • b)
    1/2
  • c)
    3/8
  • d)
    3/4
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
A fair coin is tossed three times in succession. If the first toss pro...
After first head in first toss, probability of tails in 2nd and 3rd toss = 1/2.1/2 = 1/4
∴ Probability of exactly two heads = 1 - 1/4 = 3/4
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Community Answer
A fair coin is tossed three times in succession. If the first toss pro...
After first head in first toss, probability of tails in 2nd and 3rd toss = 1/2.1/2 = 1/4
∴ Probability of exactly two heads = 1 - 1/4 = 3/4
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