Mathematics
Draw a cumulative frequency curve for the following data :
| Marks obtained | No. of students |
|---|---|
| 0 - 10 | 8 |
| 10 - 20 | 10 |
| 20 - 30 | 22 |
| 30 - 40 | 40 |
| 40 - 50 | 20 |
Hence, determine :
(i) the median
(ii) the pass marks if 85% of the students pass.
(iii) the marks which 45% of the students exceed.
Related Questions
If the median of 5, 9, 11, 3, 4, x, 8 is 6, find the value of x.
The marks scored by 16 students in a class test are :
3, 6, 8, 13, 15, 5, 21, 23, 17, 10, 9, 1, 20, 21, 18, 12.
Find :
(i) the median
(ii) lower quartile
(iii) upper quartile
(iv) inter quartile range.
Calculate the mean, the median and the mode of the following distribution :
Age in years No. of students 12 2 13 3 14 5 15 6 16 4 17 3 18 2 The daily wages of 30 employees in an establishment are distributed as follows :
Daily wages (in ₹) No. of employees 0 - 10 1 10 - 20 8 20 - 30 10 30 - 40 5 40 - 50 4 50 - 60 2 Estimate the modal daily wages for this distribution by a graphical method.