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S1 (WJEC) DISCRETE RANDOM VARIABLES - Welsh Government

REVISION SHEET – S1 (WJEC) DISCRETE RANDOM VARIABLES Discrete random variables with probabilities p 1, p 2, p 3, p 4, , p n can be Illustrated using a vertical line chart: The main ideas are: ... • A discrete random variable X takes values x i with probabilities p i

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