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probability statistics

A target for shooting practice consists of 3 consecutive rings C1, C2, C3 of radii 1,2,3 respectively. A shot scores 3 points if it falls inside C1, 2 points if it falls between C1 and C2, 1 point if it falls between C2 and C3 and 0 points if it falls outside C3. The probability function of "r" the distance of a shot from the centre is e to the power -r. What is the expected value of the score for a single shot?

Posted in Math, asked by D Maclean, 6 years ago. 1642 hits.
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