The students in a school participate in exactly one CCA each. The table shows information on the type of CCA which students in a class participate in.

(a)
How many males participate in uniformed groups?

Answer ...
(b)
A pie chart is to be drawn showing the data for the females.
Calculate the angle representing females participating in uniformed groups.

Answer ...

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Worked solution

1. Find the number of males in uniformed groups using the table totals

Total in Uniformed Groups:
$40-16-12=12$
Males in Uniformed Groups:
$12-3=9$

Answer

$9$

1. Calculate the pie chart angle for females in uniformed groups

Females in uniformed groups $=3$ and total females $=18$ .

$\text{Angle}=\frac{3}{18}\times 360^\circ=60^\circ$

Answer

$60^\circ$

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