Sets and Counting

Question

In a survey, 195 consumers were asked about their buying preferences concerning a product that is sold in the market under three labels. The results were as follows.
11 buy only those sold under label A.
26 buy only those sold under label B.
28 buy only those sold under label C.
13 buy only those sold under labels A and B.
11 buy only those sold under labels A and C.
15 buy only those sold under labels B and C.
9 buy the product sold under all three labels.
How many of the consumers surveyed buy the product sold under
(a) At least one of the three labels?
    ?       consumers

(b) Labels A and B but not C?
       ?       consumers

(c) Label A?
       ?       consumers

(d) None of these labels?
      ?      consumers

Answer 1

Use the Venn diagram here:  https://www.wyzant.com/resources/files/396074/abc_venn_diagram

 

by using the numbers you are given and filling in each piece of the diagram, e.g. the last number, 9, goes right in the middle "triangular" region.

 

Need more help comment back.