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Please help. Thank you! Suppose that I have a list of numbers. Suppose that you know that 10% are the number 15 and 20% are

Please help. Thank you!

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Suppose that I have a list of numbers. Suppose that you know that 10% are the number 15 and 20% are the number 25. The remaining numbers are 50. What is the expected value of a number arbitrarily chosen from the list? (Give 2 decimal places)

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