The television show Lett3rs has been successful for many years. That show recently had a share of 25, meaning that among the TV sets in use, 25% were tuned to Lett3rs . Assume that an advertiser wants...

The television showLett3rs has been successful for many years. That show recently had a share of 25, meaning that among the TV sets in use, 25% were tuned toLett3rs. Assume that an advertiser wants to verify that 25% share value by conducting its own survey, and a pilot survey begins with 13 households have TV sets in use at the time of aLett3rs broadcast.


Find the probability that none of the households are tuned toLett3rs.

P(none) =


Find the probability that at least one household is tuned toLett3rs.

P(at least one) =


Find the probability that at most one household is tuned toLett3rs.

P(at most one) =


If at most one household is tuned toLett3rs, does it appear that the 25% share value is wrong? (Hint: Is the occurrence of at most one household tuned toLett3rs unusual?)