Mathematics 4024 · O Level · Averages and measures of spread
Averages and measures of spread — practice question
A survey of 100 adults in a town asked how many emails each person received on one day. The table presents the findings.
(a)[1]
Determine the mode.
(b)[2]
Calculate the mean.
(c)[2]
A single adult is picked at random. Find the probability that this adult received fewer than $4$ emails that day. Give your answer as a fraction in its simplest form.
(d)[2]
The town contains $18\,000$ adults. Use the survey data to estimate how many adults in the town received exactly $5$ emails that day.
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “$4$” …