Mathematics · Probability Distribution
Let X be a discrete random variable representing the number x appearing on the face of a biased die when it is rolled. The probability distribution of X is given below: X = x | 1 | 2 | 3 | 4 | 5 | 6 P(X = x) | 0.1 | 0.15 | 0.3 | 0.25 | k | k Then the variance of X is:
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1.93
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