Bro. U cannot cAlculate like that la.
If u do that, u r assuming one is the subset of the other.
Means out of the entire population, 13.5% owns a condo, and out of this 13.5%, 45% owns a car. Means all those who own cars are also condo owners.
If this is the case, then the probability of u owning a car AND a condo is like what u said: 0.135x0.45.
BUT, this is not the case! 45% of the ENTIRE population owns car. 13.5 percent of the ENTIRE population owns condo. One is not the subset of the other.
Means you are in fact looking for the area where A intersects B, where A is not a subset of B.
I think i just did a bad job at explaining. Need to draw diagrams. Haha.
Anyway, put it simply, there are HH which stays in
HDB and owns car. And there are HH which stays in condo but dont own a car. So u cannot multiply lidat.
Quote:
Originally Posted by Unregistered
Here is how the % is calculated
% of HH living in condo 13.5%
% of HH owning a car 45%
So, if a HH living in condo and own a car, it will be = 0.45x0.135 = 6%.
You learn this in probability lesson in secondary school.
Assuming, only 30% of these HH have fully paid condo and car, it will then be 1.8%
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