The cumulative frequency diagram shows the marks obtained by $80$ students in an exam.
(a)[2]
Use the cumulative frequency diagram to fill in the frequency table.
(b(i))[1]
Use the cumulative frequency diagram to estimate the median mark.
(b(ii))[2]
Use the cumulative frequency diagram to estimate the $30$th percentile.
(b(iii))[2]
Use the cumulative frequency diagram to find how many students scored $76$ marks or more.
Worked solution & mark scheme
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