Sponsor X's ad is 1 among 15 ads to be shown in the first break.

For X's ad to be shown as one of the first two ads:

It can be shown as the first ad

or

Doesn't get shown as the first ad AND gets shown as the second ad

\(P= \frac{1}{15}+\frac{14}{15}*\frac{1}{14}\)

\(P= \frac{1}{15}+\frac{1}{15}\)

\(P= \frac{2}{15}\)

"The information that it is a 30 sec ad is superfluous."

Ans: "D"

_________________

~fluke

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