
Concept explainers
In Exercises 15–24, calculate the expected value, the variance, and the standard deviation of the given random variable X. (You calculated the expected values in the Section 9.3 exercises. Round all answers to two decimal places.)
Twenty darts are thrown at a dartboard. The probability of hitting a bull’s-eye is .1. Let X be the number of bull’s-eyes hit.

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Chapter 9 Solutions
Student Solutions Manual for Waner/Costenoble's Finite Math and Applied Calculus, 7th
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