The diameter of a round rock in a bucket, can be messured in mm and considered a random variable X in f(x)  f(x) = k(x-x4) if 0 ≤ x ≤ 1 f(x) = 0 otherwise. Find the expectation E(4X+ 3) and variance V(4X+3)

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A: Hi, Thanks for posting. As requested, we'll solve only question #3

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