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A box holds 5 green and 3 yellow marbles. Two marbles are picked together at random. What is the probability that both are green? (answer as a fraction)

Competition practiceProbability & Permutation
  • A5/14
  • B25/64
  • C5/8
  • D3/14

Step-by-Step Solution

Ways to pick 2 green = C(5,2) = 10. Ways to pick any 2 = C(8,2) = 28. Probability = 10/28 = 5/14.
Answer: A) 5/14

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