Level 3
On 1 May to 4 May, an average of 50 waffles were sold and from 5 May to 9 May, an average of 24 waffles were sold. $240 worth of waffles were sold from 10 May to 20 May. Given that a waffle was sold for $2, find the average number of waffles sold from 1 May to 20 May.
Level 3
56 students from Class K and Class L took a Mathematics test. The average marks of the students was 77 marks. The average marks of the students in Class K was 82 marks and the average marks of the students in Class L was 74 marks. How many students were there in Class K?
