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AP EAMCET2011MathematicsProbability

A class has fifteen boys and five girls. Suppose three students are selected at random from the class. The probability that there are two boys and one girl is

Options

  1. A35 76
  2. B35 38
  3. C7 76
  4. D35 72

Correct answer

A. 35 76

Step-by-step solution

aligned Required probability & = ¹⁵ C₂ ^5 C₁ ²⁰ C₃ & = 15 7 5 20 19 18 3 2 & = 7 25 20 19 = 35 76 aligned

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