I dont get this..please help?

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.

Question

I dont get this..please help?

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.

anonymous · Answer

no, were supposed to solve it..its not multiple choice:)

anonymous · Answer

o in that case im not sure eather.