Question

In a class of 40 students, the marks obtained by each student in Mathematics out of a total of 20 marks is given below.

07, 08, 10, 19, 20, 17, 16, 12, 11, 10, 09, 13, 05, 15, 14, 20, 18, 06, 08, 17, 13, 15, 11, 09, 06, 15, 16, 20, 12, 15, 08, 11, 13, 19, 20, 08, 16, 07, 18, 12

Using tally marks, find the number of students who scored more than 14 marks.

Answer 1

Let us first arrange the marks obtained in an ascending order.

05, 06, 06, 07, 07, 08, 08, 08, 08, 09, 09, 10, 10, 11, 11, 11, 12, 12, 12, 13, 13, 13, 14, 15, 15, 15, 15, 16, 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 20, 20

17 students scored more than 14 marks.

Thus, they will be represented using tally marks as IIII IIII IIII II.