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Permutation & Combination Or Probability Questions

  • Numerical Ability - Permutation & Combination Or Probability
Question

 A bag contains 20 tickets numbered from 1 to 20. Two tickets are drawn at random. What is the probability that both numbers are prime ?

  • A) 8/20
  • B) 14/95
  • C) 7/20
  • D) 21/190
  • E) 21/95
Solution
solution image
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