Foodmart customers regularly buy at least one of the following products: milk, chicken, or apples. 60% of shoppers buy milk, 50% buy chicken, and 25% buy apples. If 10% of the customers buy all 3 products, what percentage of Foodmart customers purchase exactly 2 of the products listed above?	Choose the correct option.
A) 5%	B) 10%	C) 15%	D) 25%	E) 30%
The formula is   n(AUBUC) = n(A)+n(B)+n(C)-B+A-N   where B is both (it will sum of (AB), (BC), (CA)).   and A is All   and N is neither   so plugging in we get   100 = 60+50+25+10-B-0   B = 45.   exactly two = 45 - 3(10) = 15   subtracting 10% three times as this value is including in all the (AB), (BC), (CA).   Answer 15%
<result>C</result>
Foodmart customers regularly buy at least one of the following products: milk, chicken, or apples. 60% of shoppers buy milk, 50% buy chicken, and 25% buy apples. If 10% of the customers buy all 3 products, what percentage of Foodmart customers purchase exactly 2 of the products listed above?