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AP EAMCET202420 May 2024Morning ShiftMathematicsProbabilityActual

For the probability distribution of a discrete random variable X as given below, the mean of X is

Options

  1. A3 5
  2. B4 5
  3. C6 5
  4. D8 5

Correct answer

B. 4 5

Step-by-step solution

_ x=-2 ^3 P(X=x)=1 1 10 +k+ 2 10 +k+ 3 10 +k+ 3 10 +k+ 4 10 +k+ 2 10 =1 5 k+ 15 10 =1 k= -1 10 So, probability distribution becomes Mean ( )= -2 10 + -1 10 + 2 10 + 6 10 + 3 10 = 4 5

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