# Question: question 20 the marks of 10 students in a physics...

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Question 20. The marks of 10 students in a Physics exam are shown. 44, 53, 54, 54, 59, 60, 61, 62, 73, 75

(i) Find the interquartile range.

(ii) Which mark is the outlier? Justify your answer with calculations.

Question 21 (11 marks)

a) Simplify: 3𝑎 2𝑏 × 5𝑎𝑏

b) If the cost of electricity is 28.9 cents/kWh, calculate the cost of 720 kWh.

c) In a flavoured milk drink, the ratio of milk to flavour in a drink is 7:2.

i) How much flavour is needed if the drink is to contain 2.8 L of milk?

(ii) The internal dimensions of a drink container in the shape of a rectangular prism 2 are 12 cm by 9 cm by 5 cm. To completely fill the container with the flavoured milk, how many litres of flavour are required? ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ..............................................................................................................................