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: “$1-\left(\dfrac{2}{5}+\dfrac{1}{4}\right)$” …