BMAT question help needed

amin123

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Apr 16, 2019
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Can someone please explain question 33) -- why is the answer A (8%)??? Thanks :)

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Jomo

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Dec 30, 2014
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What have you tried, where are you stuck? Please show us you work so we know where you need help.
 

amin123

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Joined
Apr 16, 2019
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All I understand is that 20% of people use cannabis. Of this 41 % will have a psychotic episode. I find 41% of 20%, yes it will give me (A) 8%. But, the problem is that tells me the proportion of cannabis users that are experiencing psychosis. The question wants the proportion of psychosis caused by cannabis. So think of it like a pie chart with factors of psychosis. Our aim is to find the proportion of psychosis caused by cannabis. The working out I used to find 8% is not the same things as what the question wants.
 
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