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A number x is chosen at random from the set 1 , 2 , 3 , 4 , … … , 100 . Define the event: A = the chosen number x satisfies x - 10 x - 50 x - 30 ≥ 0, then P A is

Options

  1. A0.20
  2. B0.51
  3. C0.71
  4. D0.70

Correct answer

C. 0.71

Step-by-step solution

S = 1 , 2 , 3 … … 100 A : Chosen no. x satisfies x - 10 x - 50 x - 30 ≥ 0 ∴ x ∈ 10 , 11 , 12 … … 29 ∪ 50 , 51 … … 100 P A = 71 100 = 0.71

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