MathematicsPreparing for Higher Math· Statistics & ProbabilityQ21
As printed in the official booklet.
Cameron’s bookshelf has 3 books with a rating of 10 , 5 books with a rating of 100 , and 2 books with a rating of 70 . There are no other books on the bookshelf. What is the expected value, to the nearest whole number, of the rating of a book randomly selected from Cameron’s bookshelf?
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