A rock concert producer has scheduled an outdoor concert. The producer estimates the attendance will depend on the weather according to the following table.
| Weather |
Attendance |
Pobability |
| wet, cold |
4000 |
0.1 |
| wet, warm |
15000 |
0.1 |
| dry, cold |
20000 |
0.2 |
| dry, warm |
40000 |
0.6 |
(a) What is the expected attendance?
(b) If tickets cost $20 each, the band will cost $300000, pluse $55000 for administration. What is the expected profit?