The table below shows the frequency distribution of marks obtained by 36 students in a class:

Class Marks Frequencies
0 but less than 5 6
5 but less than 10 10
10 but less than 15 8
15 but less than 20 12

The first quartile of the distribution is:
A. 6.0
B. 6.2
C. 6.3
D. 6.4
E. 6.5

E

Explanation: The correct answer is E. To calculate the first quartile (Q1), we use the formula for grouped data:

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