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 2 years ago
Stats Question
Real estate ads suggest that 63% of homes for sale have garages, 21% have pools, and 18% have both features. What is the probability that a home for sale has:
a) A pool or garage?
b) Neither a pool or garage?
c) A pool but no garage?
 2 years ago
Stats Question Real estate ads suggest that 63% of homes for sale have garages, 21% have pools, and 18% have both features. What is the probability that a home for sale has: a) A pool or garage? b) Neither a pool or garage? c) A pool but no garage?

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mariomintchev
 2 years ago
Best ResponseYou've already chosen the best response.0For a I have to use the formula: P(A) + P(B)  P(A n B) =

mariomintchev
 2 years ago
Best ResponseYou've already chosen the best response.0Yeah, my teacher drew that out for us today. I don't really get what goes in the formula for part a though.

Polrek
 2 years ago
Best ResponseYou've already chosen the best response.1So the entire garage circle is 63% and the entire Pool circle is 21%. But these two percentages also contain the percentage of houses which have both. So you should add together the 63% and the 21%, and subtract the 18%, which is the intersection of A and B.

mariomintchev
 2 years ago
Best ResponseYou've already chosen the best response.0yeah i see that now.

mariomintchev
 2 years ago
Best ResponseYou've already chosen the best response.0for b, do i take 37 + 79 and then subtract 82?

Polrek
 2 years ago
Best ResponseYou've already chosen the best response.1I think you should just take the complement of your answer to A.

Polrek
 2 years ago
Best ResponseYou've already chosen the best response.166% of houses have either a pool or a garage, so (10.66) = 0.44 will have none of these.

mariomintchev
 2 years ago
Best ResponseYou've already chosen the best response.0i am given this formula though: P(A)=1P(A^c)

Polrek
 2 years ago
Best ResponseYou've already chosen the best response.1Yeah, so 1P(A)' = P(A), and this works the other way. 1P(A) = P(A)'

mariomintchev
 2 years ago
Best ResponseYou've already chosen the best response.0it's 0.34. you subtracted wrong.

Polrek
 2 years ago
Best ResponseYou've already chosen the best response.1Haha oh dear, more coffee required. Sorry. Do you get the idea though?

mariomintchev
 2 years ago
Best ResponseYou've already chosen the best response.0yeah, i'm getting it slowly but surely. this is my first time taking stats and i just started, so i'm getting used to it.

Polrek
 2 years ago
Best ResponseYou've already chosen the best response.1My advice is to get the hang of drawing those Venn Diagrams. They are really helpful.

mariomintchev
 2 years ago
Best ResponseYou've already chosen the best response.0can you help me with part c too?

Polrek
 2 years ago
Best ResponseYou've already chosen the best response.1This area, right? dw:1346194888234:dw
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