The distribution of Junior workers is as follow: Clerks - 78, Drivers - 36, Typists - 44, Messengers - 52, other - 30. Represent the above information by a pie chart. b. The table below show the frequency distribution of marks scored by 30 Candidates in a operate test.

$$\text{Total workers} = 78 (\text{Clerks}) + 36 (\text{Drivers}) + 44 (\text{Typists}) + 52 (\text{Messengers}) + 30 (\text{Other})$$ $$\text{Total workers} = 240$$

The total angle in a circle is $360^\circ$.
The formula for the angle of a sector is:

$$\text{Angle} = \left( \frac{\text{Number in category}}{\text{Total workers}} \right) \times 360^\circ$$

• Clerks:

$$\text{Angle for Clerks} = \left( \frac{78}{240} \right) \times 360^\circ = 0.325 \times 360^\circ = 117^\circ$$

• Drivers:

$$\text{Angle for Drivers} = \left( \frac{36}{240} \right) \times 360^\circ = 0.15 \times 360^\circ = 54^\circ$$

• Typists:

$$\text{Angle for Typists} = \left( \frac{44}{240} \right) \times 360^\circ = 0.1833... \times 360^\circ = 66^\circ$$

• Messengers:

$$\text{Angle for Messengers} = \left( \frac{52}{240} \right) \times 360^\circ = 0.2166... \times 360^\circ = 78^\circ$$

• Other:

$$\text{Angle for Other} = \left( \frac{30}{240} \right) \times 360^\circ = 0.125 \times 360^\circ = 45^\circ$$

• Clerks: $\mathbf{117^\circ}$
• Drivers: $\mathbf{54^\circ}$
• Typists: $\mathbf{66^\circ}$
• Messengers: $\mathbf{78^\circ}$
• Other: $\mathbf{45^\circ}$

These angles sum to $117^\circ + 54^\circ + 66^\circ + 78^\circ + 45^\circ = 360^\circ$.