Marks | number of students |
1 - 20 | 10 |
20 - 40 | 40 |
40 - 60 | 15 |
60 - 80 | 12 |
80 - 100 | 30 |
What is the ratio of the number of student between 20-40 and 80-100 marks?
The graph shows Income and Expenditure(Rs. in lakhs) of a company.The number of years in which the income exceeds the average income is :
