What approach shall we use while solving questions of such types?
Nicotino’s estimates that 10% of the people in Florida are smokers who do not drink and that 50% of the people in Florida who drink are smokers. If 40% of the people in Florida are smokers, what percentage of people are non-smokers and non-drinkers.
A 10%
B 30%
c 40%
d 45%
e 60%
Hi Nirvan,
Best way to solve these problems is to use the 2 * 2 table method.
It is a mutually exclusive, draw a table with rows and columns,
Let assume the number of people in Florida be 100.
Then, number of smokers be 40
Number of non-smokers will be 60.
With the given information provided, we can fill the rest of the boxes.
S NS Total
D 30 30 60
ND 10 30 40
Total 40 60 100
So the answer is B.
Hope this helps.
