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A bag contains 21 markers with numbers 1 to 21 . A marker is drawn at random and then replaced and then a second marker is drawn. The probability that the first number is odd and the second is even is

Options

  1. A10 21
  2. B11 21
  3. C110 441
  4. D100 441

Correct answer

C. 110 441

Step-by-step solution

Probability that the first marker is odd = 11 21 Probability that the second marker is even = 10 21 The required probability = 11 21 × 10 21 = 110 441

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