The 120 consumers were asked about their buying preferences concerning a product that is sold in the market under three labels. The results were: 12 buy only those sold under label A, 25 buy only those sold under label B, 26 buy only those sold under label C, 15 buy only those sold under labels A and B, 10 buy only those sold under labels A and C, 12 buy only those sold under labels B and C and 8 buy the product sold under all three labels.


Required:

a. How many of the consumers surveyed buy the product sold under Label B?

b. How many of the consumers surveyed buy at least one of these labels?

c. How many of the consumers surveyed buy the product sold under one label only?