Question

In a certain​ city, projections for the next year indicate there is a​ 20% chance that electronics jobs will increase by 1300​, a​ 50% chance that they will increase by 300​, and a​ 30% chance they will decrease by 900. Find the expected change in the number of electronics jobs in that city in the next year. The expected change is an increase of nothing jobs.

Answer 1

110

Explanation:

%20 increase =
`(20)/(100) 1300 = 260\\`

%50 decrease =
`(50)/(100)300 = 150`

%30 no change =
`(30)/(100)0 = 0`

Expected change = Increase - Decrease + No Change

Expected change = 260 - 150 + 0

Expected change = 110