A telephone survey to determine viewer response to a new television show obtained the following data.

Rating                                     Frequency

Poor …………………………………            4

Below average ………………………      8

Average ……………………………..        11

Above average ……………………..     14

Excellent …………………………..         13

a. What is the probability that a randomly selected viewer will rate the new show as average or better?

b. What is the probability that a randomly selected viewer will rate the new show below average or worse?