Suppose you must take the bus to school. The probability that you will have to wait for the bus is 0.25. If you don't have to wait for the bus the commute takes 20 minutes, but if you must wait for...

Suppose you must take the bus to school. The probability that you will have to wait for the bus is 0.25. If you don’t have to wait for the bus the commute takes 20 minutes, but if you must wait for the bus, the commute takes 30 minutes.

Blank 1 a. What is the expected value of the time it takes you to commute to school?

Blank 2 b. Find the standard deviation.

Express your answers in 2 decimal places.

Extracted text: Suppose you must take the bus to school. The probability that you will have to wait for the bus is 0.25. If you don't have to wait for the bus the commute takes 20 minutes, but if you must wait for the bus, the commute takes 30 minutes. Blank 1 a. What is the expected value of the time it takes you to commute to school? Blank 2 b. Find the standard deviation. Express your answers in 2 decimal places.