Mathematics (AS & A Level) · Oct / Nov 2022 · Paper 61 · Question 6
9709
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The diagram shows the graph of the probability density function of a random variable X that takes values between −1 and 3 only. It is given that the graph is symmetrical about the line x = 1. Between x = −1 and x = 3 the graph is a quadratic curve. The random variable S is such that ES = 2 × EX and VarS = VarX .
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6(a)[1]
6(b)[2]
6(c)[3]
6(d)[1]
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