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Suppose John writes down a single number that is in the range from 1 to 20,...

Suppose John writes down a single number that is in the range from 1 to 20, and Susan also writes down a single number in the range from 1 to 20. What is the probability that the number John wrote down will be higher than Susan’s?

Math   Statistics-And-Probability   
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Answer #1

Answer: required probability is 0.475.

The detailed solution is given in the pictures below.

Please go through them carefully specially the notations.

Hope the solution helps. Thank you.

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