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Two numbers are selected randomly from set S = 1,2 , 3,4 , 5,6 without replacement one by one. The probability that a minimum of two number is less than 4 , is

Options

  1. A1 15
  2. B14 15
  3. C1 5
  4. D4 5

Correct answer

D. 4 5

Step-by-step solution

Total cases = C 2 = 15 6 Minimum of 2 numbers < 4 = Total – (both numbers must be ≥ 4 ) = 15 - C 2 = 12 3 The required probability = 12 15 = 4 5

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