A rock concert producer has scheduled an outdoor concert. The producer estimates the attendance will depend on the weather according to the following data.

to find the expected attendance, multiply the attendance by probability then add the products
6000 * 0.1 = 600
25000 * 0.2 = 5000
15000 * 0.2 = 3000
55000 * 0.5 = 27500
27500 + 3000 + 5000 + 600 = 36100
36100 * 15 = 541500 - 300000 = 241500 - 55000 = 186500