Foodmart customers regularly buy at least one of the following products: milk, chicken, or apples. 60% of shoppers buy milk, 40% buy chicken, and 35% 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 answer
A)  5%  B)  10%  C)  25%  D)  15%  E)  30%
Total = n(A) + n(B) - n(Exactly 2 products) -2 (AnBnC) + Neither.   Neither is zero.   Hence 100 = 60 + 40 + 35 - n (Exactly 2 products) - 2*10   100 = 115 - n (Exactly 2 products) =&gt; n (Exactly 2 products) = 15.   Answer:  15%
<result>D</result>
Foodmart customers regularly buy at least one of the following products: milk, chicken, or apples. 60% of shoppers buy milk, 40% buy chicken, and 35% buy apples. If 10% of the customers buy all 3 products, what percentage of Foodmart customers purchase exactly 2 of the products listed above?