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प्रश्न
Below is the histogram depicting marks obtained by 43 students of a class:
(i) Write the number of students getting the highest marks.
(ii) What is the class size?
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उत्तर
(i) In the given histogram, the interval with the highest marks is 90-100.
Three students are there in this interval because the height of the rectangle (90-100) is 3 units.
(ii) The class intervals are 10-20, 20-30, ..., 90-100. So, the class size is 10.
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संबंधित प्रश्न
The following is the frequency distribution of waiting time at ATM centre; draw histogram to represent the data:
| Waiting time (in seconds) |
Number of Customers |
| 0 -30 | 15 |
| 30 - 60 | 23 |
| 60 - 90 | 64 |
| 90 - 120 | 50 |
| 120 - 150 | 5 |
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| Frequency | 12 | 20 | 26 | 18 | 10 | 6 |
Draw histogram for the following frequency distributions:
| Class Interval | 30 – 39 | 40 – 49 | 50 – 59 | 60 – 69 | 70 – 79 |
| Frequency | 24 | 16 | 09 | 15 | 20 |
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| Class interval: | 140−145 | 145−150 | 150−155 | 155−160 | 160−165 |
| Frequency: | 8 | 12 | 18 | 10 | 5 |
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| Variate | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
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| 32-34 | 22 |
| 34-36 | 12 |
| 36-38 | 6 |
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| 440 - 460 | 2 |
| 460 - 480 | 4 |
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| 500 - 520 | 5 |
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| 540 - 560 | 2 |
| 560 - 580 | 1 |
| 580 - 600 | 4 |
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