The proportion of tin in a metal alloy has a beta distribution with parameters a = 8.2

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The proportion of tin in a metal alloy has a beta distribution with parameters a = 8.2 and b = 1 1.7.
(a) What is the expected proportion of tin in the alloy?
(b) What is the standard deviation of the proportion of tin in the alloy?
(c) What is the median proportion of tin in the alloy)?
Distribution
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