What is the probability that exactly four of them will catch a cold?

In terms of advertising allocation, a continuous campaign schedule is best for products that have:

A) steady sales throughout the year B) peak seasons but do sell throughout the entire year C) peak seasons at certain times in the year and are not purchased at all during other times of the year D) a high level of fluctuating demand

A spot ad is:

A) a one-time placement of an ad on a local television station B) one that is placed in a specific location in an ad sequence C) the placement of an ad series on a specific television show D) a one-time placement of an ad in a magazine or other print media