Probability question (details on image)

1. Mar 30, 2015

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution
The superimposed diagram shows that the probability of a noncommunicable disease in a underdeveloped country is 0.37. But it's not correct…

I tried 0.56*0.78 = 0.44 as the probability of a noncommunicable disease in a underdeveloped country since the probability of a death from a noncommunicable disease is 0.56 and the probability of death in a underdeveloped country is 0.78. The answer is also wrong..

What am I doing wrong. How do you solve this?

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2. Mar 30, 2015

Staff: Mentor

it looks like the images are venn diagrams. From the middle diagram you get the .22 in the D set which in the third diagram is 0.02+0.01+0.19

So how would you find the orange area ie the 0.37 area given the 0.78 and the 0.09 and the 0.32?

3. Mar 31, 2015

haruspex

In the third diagram, you are only interested in the areas that relate to the given condition. What are the numbers in those?

4. Mar 31, 2015

RUber

Conditional probability questions should look something like:
P(N|U)=P(N and U)/P(U).
You have both of those probabilities.