Question

A survey of 2500 subscribers to a certain news paper revealed that 2250 people subscribe to the daily morning edition and 1250 subscribe to both the daily and the Sunday editions.

Answer 1

how many suscrube for sunday edition?

Answer 2

2. how many suscribe for sunday edition ONLY?

Answer 3

So we have \(D\) be all daily morning subscribers and \(S\) be Sunday subscribers.

2500 subscribers\[
|D\cup S| = 2500
\]2250 people subscribe to the daily morning edition\[
|D| = 2250
\]1250 subscribe to both the daily and the Sunday editions\[
|D\cap S| = 1250
\]

Answer 4

ok

Answer 5

Now remember that : \[
|D\cup S| = |D| + |S| - |D\cap S|
\]Then you can solve for \(|S|\).

Answer 6

So remember that \(|S_{only}| = |S| - |S\cap D|\)