Mathematics 0580 · IGCSE · Relative and expected frequencies

Relative and expected frequencies — practice question

A spinner may stop on green, black or red. The table gives the probabilities for the spinner stopping on green or black. Table details: Colour: Green, Black, Red Probability: $\frac{2}{5}$, $\frac{1}{4}$, [blank]
(a)[2]

Fill in the table below.

(b)[1]

Find the expected number of times that it lands on green.

Worked solution & mark scheme

This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: $1-\left(\dfrac{2}{5}+\dfrac{1}{4}\right)$

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