Mathematics 9709 · AS & A Level · Continuous random variables

Continuous random variables — practice question

The table below displays the probability distribution of the discrete random variable $X$.
(main)[4]

Given that $\text{E}(X) = 0.75$, determine the values of $a$ and $b$.

Worked solution & mark scheme

This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Probabilities sum to $1$ correctly (e.g. $a + b = 0.45$)” …

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