Posted by Anonymous on Tuesday, February 19, 2013 at 9:21pm.
a survey of 70 customers was taken at a bookstore regarding the type of books purchased. the survey found that 42 customers purchased mysteries,35 purchased science fiction, 28 purchased romance novels,19 purchased mysteries and sicence fiction, 15 purchased mysteries and romance novels, 11 purchased science fiction and romance novels and 4 purchased all 3 types. how many purchased only romance novels?

algebra  JJ, Wednesday, February 20, 2013 at 9:54am
You solve this by creating a Venn Diagram with 3 intersecting circles.
Begin by putting the 4 where the 3 circles intersect.
When you are done, add up each part of all of the circles and you should get 70. If you get less than 70 that means customers purchased none of these and the difference between your total and 70 goes out side the circles.
Answer This Question
Related Questions
 algebra  A survey of 70 Customers was taken at a bookstore regarding the types ...
 college Mathematics  I have been trying to figure this out for day's please ...
 Math  A survey of 59 customers was taken at a bookstore regarding the types of ...
 Algebra  I am so confused with some word problems math is not my strong point ...
 Stats...is this correct?  A sample of purchases at the local convenience store ...
 Math  The records of a computer retail store show that out of the 25 customers ...
 Statistics  The records of a computer retail store show that out of the 100 ...
 Statistics  A sample of purchases at the local convenience store has resulted ...
 statistics  A sample of purchases at the local convenience store has resulted ...
 Math  A bookshop has some faction and nonfiction books. 2/5 of. The books are ...
More Related Questions