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Tickets numbered from 1 to 20 are mixed up together and then a ticket is drawn at random. What is the probability that the drawn ticket has a number which is a multiple of 3 or 7?
  • a)
    2/5
  • b)
    13/20
  • c)
    7/20
  • d)
    3/20
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
Tickets numbered from 1 to 20 are mixed up together and then a ticket...
Number of favourable cases = 3, 6, 9, 12, 15, 18, 7, 14 = 8 cases
Required Probability = 8/20 = 2/5
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Tickets numbered from 1 to 20 are mixed up together and then a ticket is drawn at random. What is the probability that the drawn ticket has a number which is a multiple of 3 or 7?a)2/5b)13/20c)7/20d)3/20Correct answer is option 'A'. Can you explain this answer?
Question Description
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