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Which of the following are probability functions. f(x)=0.2 for x=0,1,2,3,4    [2 MARKS] f(X)= x^2+x+1 for x=0.1,0.3,0.4,0.7,0.9    [2 MARKS]...

Which of the following are probability functions.

  1. f(x)=0.2 for x=0,1,2,3,4    [2 MARKS]
  2. f(X)= x^2+x+1 for x=0.1,0.3,0.4,0.7,0.9    [2 MARKS]
  3. f(X)=x for x=0.1,0.2,0.3,0.4    [2 MARKS]
Math   Statistics-And-Probability   
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