Question 1177678: In a city three newspapers
X , Y , Z
are published ,
40%
of the people of the city read
X , 50%
read
Y , 30%
read
Z , 20%
read both
X
and
Y ,15%
read both
X
and
Z
and
24%
read all the three papers. Calculate the percentage of people who do not read any of
the three papers. [
Answer by ikleyn(52817)   (Show Source):
You can put this solution on YOUR website! .
It could be a nice, beautiful first class problem, BUT, UNFORTUNATELY,
it describes, BY MISTAKE, a situation which NEVER MAY HAPPEN in real life,
because the intersection of the three sets XYZ (24%) is, according to the condition,
GREATER than the intersection of two subsets XY (20%) and XZ (15%).
So, in this form, as presented in the post, the problem is good for re-cycling, only.
Unfortunately, the person who composed this problem, has lack of knowledge in elementary Math.
//////////
When you complete reading my post, do not forget to submit your "THANKS" to me for my teaching.
At least, do not post your anathema to me for opening your eyes,
as some visitors of this forum do.
|
|
|
