Question

The following frequency distribution with unit class interval shows, the marks obtained by () 36 girls (li) 35 boys of class VIII A and B in a certain test out of a maximum of 25 marks. Find the median of marks of each. Marks obtained 13 14 15 16 17 18 19 20 No. of girls 2 3 4 8 5 7. 6 1 Marks obtained 11 i 12 13 14 15 16 18 20 3 2 No. of boys 4 6 10 7 1 2. 222​

Answer 1

Answer:

The frequency distribution table for the given marks can be drawn as:

(i) The class interval (40−49) has the highest frequency and the class interval (90−99) has the lowest frequency.

(ii) In the class interval (30−39), the lower limit is 30 − 0.5 = 29.5 and the upper limit is

39 + 0.5 = 39.5.

(iii) The range of the given distribution is 97− 32 = 65.