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711

Q:

A glass jar contains 6 white, 8 black, 4 red and 3 blue marbles. If a single marble is chosen at random from the jar, what is the probability that it is black or blue?

  • 1
    $${8\over 21}$$
  • 2
    $${11\over 21}$$
  • 3
    $${5\over 21}$$
  • 4
    $${1\over 7}$$
  • Show Answer
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Answer : 2. "$${11\over 21}$$"

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