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A small pack of cards consists of 5 green cards, 4 blue cards and 3 black cards. The pack is shuffled through and first three cards are turned face up. The probability that there is exactly one card of each colour is

Options

  1. A9 55
  2. B4 11
  3. C3 11
  4. D8 55

Correct answer

C. 3 11

Step-by-step solution

Probability (One card of each colour) = C 1 5 . C 1 4 . C 1 3 C 3 12 = 3 11

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