a. Suppose you plan to take 3 courses next term. If you select them randomly from the listing of 12 courses, 5 of which are science courses. What is the probability that all the 3 courses you select will be science courses. b. In a certain California city, projections for the next year are that there is a 20% chance that electronics jobs will increase by 200, a 50% chance that they will increase by 300, and a 30% chance they will decrease by 800. What is the expected change in the number of electronic s jobs in that city in the next year?

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Q.8)
a. Suppose you plan to take 3 courses next term. If you select
them randomly from the listing of 12 courses, 5 of which are
science courses. What is the probability that all the 3 courses
you select will be science courses.
b. In a certain California city, projections for the next year are
that there is a 20% chance that electronics jobs will increase
by 200, a 50% chance that they will increase by 300, and a
30% chance they will decrease by 800. What is the expected
change in the number of electronic s jobs in that city in the
next year?
Transcribed Image Text:Q.8) a. Suppose you plan to take 3 courses next term. If you select them randomly from the listing of 12 courses, 5 of which are science courses. What is the probability that all the 3 courses you select will be science courses. b. In a certain California city, projections for the next year are that there is a 20% chance that electronics jobs will increase by 200, a 50% chance that they will increase by 300, and a 30% chance they will decrease by 800. What is the expected change in the number of electronic s jobs in that city in the next year?
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