Mathematics (AS & A Level) · May / June 2021 · Paper 61 · Question 6
9709
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The probability density function, f, of a random variable X is given by fx = T k6x −x2 0 ≤x ≤6, 0 otherwise, where k is a constant. State the value of EX and show that VarX = 9 5. [6] 9
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