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AP EAMCET202125 Aug 2021Morning ShiftMathematicsProbabilityActual

A one-rupee coin, a two rupee coin, a five rupee coin and a ten rupee coin are tossed simultaneously. Then, the expected value of the sum of the values of coins that show heads up is

Options

  1. A8
  2. B7
  3. C10
  4. D9

Correct answer

D. 9

Step-by-step solution

Expected value of sum of the value of coins shows head up aligned & =1 1 2 +2 1 2 +5 1 2 +10 1 2 & = 1+2+5+10 2 = 18 2 =9 & [ Probability of getting head =1 / 2] aligned

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