A "green" product (e.g., a product built from recycled materials) is one that has minimal impact on the environment and human health. How do consumers determine if a product is "green"? The 2011 Image Power Green Brands Survey asked this question of more than 9,000 international consumers. The results are shown in the following table.

a. What method is an international consumer most likely to use to identify a green product?
b. Find the probability that an international consumer identifies a green product by a certification mark on the product label or by the product packaging.
c. Find the probability that an international consumer identifies a green product by reading about the product or from information at the brand's Web site.
d. Find the probability that an international consumer does not use advertisements to identify a green product.

Reason for Saying a Product Is Green Percentage of Consumers Certification mark on label Packaging Reading information about 45 15 the product Advertisement Brand Web site Other 12 18 Total 100