Advertisements
Advertisements
प्रश्न
Age (in years) of 6 children of two groups are recorded as below:
| Age (in Years) | |
| Group A | Group B |
| 7 | 7 |
| 7 | 9 |
| 9 | 11 |
| 8 | 12 |
| 10 | 12 |
| 10 | 12 |
- Find the mode and range for each group.
- Find the range and mode if the two groups are combined together.
उत्तर
From the given table, age of children in group A = 7 yr, 7 yr, 9 yr, 8 yr, 10 yr, 10 yr
Age of children in group 8 = 7 yr, 9 yr, 11 yr, 12 yr, 12 yr, 12 yr
a. Mode in group A = 7 yr and 10 yr. .......[∵ 7 yr and 10 yr occurs most frequent, i.e.2 times]
Range in group A = Maximum value – Minimum value
= 10 – 7
= 3
Mode in groups B = 12 yr ......[∵ 12yr is the most frequent, i.e. 3]
Range in group B = Maximum value – Minimum value
= 12 – 7
= 5
b. If both groups are combined together 7, 7, 7, 9, 9, 11, 8, 12, 10, 12, 10, 12.
Mode = 7 and 12 ......[∵ 7 and 12 occurs most frequent, i.e. 3 times]
∴ Range = Maximum value – Minimum value
= 12 – 7
= 5
APPEARS IN
संबंधित प्रश्न
The rainfall (in mm) in a city on 7 days of a certain week was recorded as follows:
| Day | Monday | Tuesday | Wednesday | Thursday | Friday | Saturday | Sunday |
| Rainfall (in mm) | 0.0 | 12.2 | 2.1 | 0.0 | 20.5 | 5.5 | 1.0 |
- Find the range of the rainfall in the above data.
- Find the mean rainfall for the week.
- On how many days was the rainfall less than the mean rainfall.
The heights of 10 girls were measured in cm and the results are as follows:
135, 150, 139, 128, 151, 132, 146, 149, 143, 141
- What is the height of the tallest girl?
- What is the height of the shortest girl?
- What is the range of the data?
- What is the mean height of the girls?
- How many girls have heights more than the mean height.
The range of the data: 21, 6, 17, 18, 12, 8, 4, 13 is ______.
The difference between the highest and the lowest observations in a data is its ______.
The difference between the highest and the lowest observations of a data is called ______.
The range of the data 2, –5, 4, 3, 7, 6 would change if 2 was subtracted from each value in the data.
The range of the data 3, 7, 1, –2, 2, 6, –3, –5 would change if 8 was added to each value in the data.
The marks in a subject for 12 students are as follows:
31, 37, 35, 38, 42, 23, 17, 18, 35, 25, 35, 29
For the given data, find the range
The following are weights (in kg) of 12 people. 70, 62, 54, 57, 62, 84, 75, 59, 62, 65, 78, 60. Find the range of the given data.
Given below are heights of 15 boys of a class measured in cm:
128, 144, 146, 143, 136, 142, 138, 129, 140, 152, 144, 140, 150, 142, 154
Find the height of the tallest boy.
