The expected value for the amount of rain on Saturday and Sunday is 2 inches and 3 inches, respectively. There is a 50% chance of rain on Saturday. If it rains on Saturday, there is a 75% chance of rain on Sunday, but if it does not rain on Saturday, then there is only a 50% chance of rain on Sunday.
What is the expected value (in inches) for the amount of rain over the weekend?
byEli Ross