The table of numbers shows the marks of 30 students in a mathematics exam. Using this data, complete the frequency table.
The marks have been split into groups, firstly, from 20 to 23 marks; secondly, from 24 to 27 marks. We also have groups from 28 to 31 marks, 32 to 35 marks, and 36 or greater marks.
There were five marks between 20 and 23 inclusive. Eight students scored between 24 and 27 marks. There were five students that scored between 28 and 31 marks. Six out of the 30 students scored between 32 and 35 marks. Finally, there were six students who scored 36 or more marks in the mathematics exam.
The missing numbers in the table were five, eight, five, six, and six, respectively. We can check these answers by adding the five numbers. Adding five, eight, five, six, and six gives us 30. And there were 30 students that sat the mathematics exam. This means that we have counted every student. And our answer is correct.