The television show NBC Sunday Night Football broadcast a game between the Colts and patriots and received a share of 22, meaning that among the TV sets in use, 22% were tuned to the games (based on Nielsen Rating Media Research). An advertiser wants to obtain a second opinion by conducting its own survey, and a pilot survey begins with 20 households having sets in use at the time of the same NBC Sunday Night Football broadcast. Find the probability that at least 4 of the household are turned into NBC Sunday Night Football.