Question: Patient response to a generic drug to control pain is scored on a 5-point scale, where a 5 indicates complete relief. Historically the distribution of

Patient response to a generic drug to control pain is scored on a 5-point scale, where a 5 indicates complete relief. Historically the of scores is
1 2 3 4 5
0.05 0.1 0.2 0.25 0.4
Two patients, assumed to be independent, are each scored.
(a) What is the probability mass function of the total score?
(b) What is the probability mass function of the average score?

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