Consider the frequency distribution table the classification of marks obtained by 40 students out of 36 marks in mathematics test.

Option 4 : 21

**Concept used:**

In statistics, a frequency distribution is a list, table or graph that displays the frequency of various outcomes in a sample

**Calculation:**

Total number of students obtained marks between 12 to 18 = 9

Total number of students obtained marks between 18 to 24 = 12

**∴ Total number of students obtained marks between 12 to 24 = 9 + 12 = 21**