Difficulty Level: Easy
Stats: 2,905 / 4,878 ( 59.55% ) got this right

In a box, there are 21 red, 13 green and 8 blue balls. One ball is picked at random. What is the probability that it is neither red nor green?

  • 1/6
  • 4/21
  • 1/4
  • 1/2
  • 17/21
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