The tally chart shows the marks students received in a mathematics test. How many students received less than 10 marks?
Each individual tally mark represents one student. Four tally marks with a line through them represents five students. This means that the tallies in the first column represent five and three students. This means that there’re eight students that received between five and nine marks in the test.
The tallies in the next column represent five, five, and five students. Adding these tells us that 15 students received between 10 and 14 marks. Seven students received between 15 and 19 marks. 11 students received between 20 and 24 marks. And finally, nine students received between 25 and 29 marks in the mathematics test.
We were asked to work out how many students received less than 10 marks. The only group that represents students that received less than 10 marks is the first group between five and nine marks.
We can therefore conclude that eight students received less than 10 marks.