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A committee of 3 members is selected from a club made up of

20

junior members and

10

senior members. What is the expected number of juniors in the​ committee?

Fill out the probability table​ below, where x represents the number of juniors in the committee.

 Apr 19, 2019
 #1
avatar+18323 
+1

Juniors make up 20 out of 30 of the members   or 2/3     

You would expect 2/3 of the committee to be juniors   2/3 x 3 = 2 committee members should be juniors

 Apr 19, 2019

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