(a)(i) The number of pupils who scored between 41 and 50 marks = \(\frac{90}{360} \times 200 = 50\)
(ii) The angles for pupils above 60 marks = 54° + 36° + 18° = 108°
\(\frac{108}{360} \times 200 = 60\)~(b) The fraction of the pupils who scored at least 50 marks : \(\frac{54 + 90}{360} = \frac{2}{5}\)
(c) The modal class = 51 - 60; It has the largest angle in the pie- chart.
~(c) The modal class = 51 - 60; It has the largest angle in the pie- chart.
