Mathematics
For the data given in the following tables, find :
(i) mean
(ii) mode (using graph)
(iii) median (using graph)
(a)
| Class-mark | Frequency |
|---|---|
| 15 | 10 |
| 25 | 12 |
| 35 | 14 |
| 45 | 16 |
| 55 | 8 |
(b)
| Class-mark | Frequency |
|---|---|
| 35 | 8 |
| 40 | 10 |
| 45 | 12 |
| 50 | 15 |
| 55 | 20 |
| 60 | 15 |
Related Questions
The marks of 10 students of a class in an examination arranged in ascending order is as follows :
13, 35, 43, 46, x, x + 4, 55, 61, 71, 80.
If the median marks is 48, find the value of x. Hence, find the mode of the given data.
The histogram below represents the scores obtained by 25 students in a Mathematics mental test. Use the data to :
(i) Frame a frequency distribution table.
(ii) To calculate mean.
(iii) To determine the modal class.
On average, 80 patients get admitted into a nursing home in a day. The ages of the patients admitted and their number are as given below :
Age (in years) No. of patients 10 - 20 13 20 - 30 23 30 - 40 25 40 - 50 14 50 - 60 5 Find :
(i) The average age for which maximum cases occur.
(ii) The upper limit of modal class.
(iii) The mean of the given data.
Along with an increase in population, electricity consumption per person is also increasing nationwide.
A survey is conducted for 560 families of Mangal Pande Nagar, Meerut. The following table gives the monthly consumption of electricity of these families.
Monthly consumption (in units) No. of families 0 - 100 160 100 - 200 120 200 - 300 180 300 - 400 60 400 - 500 40 Assuming that no family consumes more than 500 units of electricity, find :
(i) The mean monthly consumption.
(ii) The modal monthly class.