Question

Jackson goes to the gym 1, 2, or 3 days in a week, depending on work demands at the office. The probability that he goes 1 day is 0.1, the probability that he goes 2 days is 0.65, and the probability that he goes 3 days is 0.25. What is the expected value of the number of days per week for which Jackson goes to the gym?Do not round your answer.

Answer 1

We have the following values and their probabilities:

1 day = 0.1

2 days = 0.65

3 days = 0.25

Expected value = 1 (0.1) + 2 (0.65) + 3(0.25) = 0.1 + 1.3+ 0.75 = 2.15