Mathematics (AS & A Level) · May / June 2021 · Paper 53 · Question 2
9709
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The random variable X can take only the values −2, −1, 0, 1, 2. The probability distribution of X is given in the following table. x −2 −1 0 1 2 PX = x p p 0.1 q q Given that PX ≥0 = 3PX < 0 , find the values of p and q. [4]
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