Level 2
The average height of some children is 160 cm. There is an equal number of boys and girls. The average height of the boys is 170 cm. Find the average height of the girls. Give your answer in cm.
Level 2
Samantha scored a total of 98 marks for her History and Geography tests and a total of 130 marks for her Chinese and English tests. What was her average marks for the 4 subjects?