Nina goes to the supermarket 0, 1, or 2 times in a week. the probability that she goes 0 days is 0.2, the probability that she goes 1 day is 0.50, and the probability that she goes 2 days is 0.30. what is the expected value of the number of days per week on which nina goes to the supermarket? 0.8

The probability that Nins goes 0 days is 0.2, the probability that she goes 1 day is 0.50, and the probability that she goes 2 days is 0.30. You can write these data as a table:

where are numbers of days and are probabilities.

The expected value of the number of days per week on which Nina goes to the supermarket is

.

the expected value of the number of days per week on which Nina goes to the supermarket is 1.1.

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.