In 2022, sales information shows that 30% of new cars and light trucks in the United States were leased. Zook Motors in Kane, Pennsylvania, sold 40 cars and light trucks last month, 10 of them were leased. Wallis Zook, the owner, wonders if the Zook Motors’s results are similar to the national sales.
a. Based on the national sales information using 30%, what is the probability that 10 or more of the 40 cars and light trucks sold at Zook Motors were leased?
b. Using the response in part (a), decide if the Zook’s sales data are similar to the national average.