Algebra

Participants in a study of a new medication received either medication A or a placebo. Find P(placebo and improvement). You may find it helpful to make a tree diagram of the problem on a separate piece of paper.

Of all those who participated in the study, 80% received medication A.

Of those who received medication A, 76% reported an improvement.

Of those who received the placebo, 62% reported no improvement.

I don't know how to do this at all, any hints or help would be nice. :)

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  1. Did you ever get it?

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  2. participants—80% Medication A-----76% improvement
    24% no improvement
    20% placebo-------38% improvement
    62% no improvement
    20%*38%=.2*.38-7.6%

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