An urn contains 10 balls labeled 1 through 10. You randomly select three balls from the urn
without replacement. What is the expected value of the sum of the numbers on the balls selected?
Solution
(1+2+3+....+10) * (1/10 + 1/9 + 1/8) = 18.486.
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An urn contains 10 balls labeled 1 through 10. You randomly select th.pdf
1. An urn contains 10 balls labeled 1 through 10. You randomly select three balls from the urn
without replacement. What is the expected value of the sum of the numbers on the balls selected?
Solution
(1+2+3+....+10) * (1/10 + 1/9 + 1/8) = 18.486