Twenty bags of coconut milk powder are weighed. The mass of each bag, to the nearest kg, is recorded as shown below. Mass (kg)

Midpoint, x

Frequency , f

fx

1-10

5.5

5

27.5

11-20

21-30

31-40

41-50

State the lower class limit for the class interval 31-40.
State the lower class boundary for the class interval 31-40.
State the class width for the class interval 31-40.
Copy and complete the table above.
Hence, calculate the mean mass of milk powder in each bag.
(give your answer to 1 decimal place) (11 marks)

The table below shows the favourite fast foods of some form four students.
Food

Frequency

Doubles

30

Fried Chicken

25

BBQ

12

Pizza

13

Calculate the sector angles that would represent each food in a pie chart.

(8 marks)​