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Q:

A bag contains 2 red, 3 green and 2 blue balls. Two balls are drawn at random. What is the probability that none of the balls drawn is blue?

  • 1
    $$ 10\over21$$
  • 2
    $$ 11\over21$$
  • 3
    $$ 2\over7$$
  • 4
    $$ 5\over7$$
  • 5
    None of these
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Answer : 1. "$$ 10\over21$$"

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