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प्रश्न
Look at the histogram below and answer the questions that follow.
- How many students have height more than or equal to 135 cm but less than 150 cm?
- Which class interval has the least number of students?
- What is the class size?
- How many students have height less than 140 cm?
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उत्तर
a. Number of students who have height more than or equal to 135 cm, but less than 150 cm = 14 + 18 + 10 = 42
b. The class interval 150 – 155 has the least number of students, i.e. 4.
c. We know, class size = Upper class limit – Lower class limit
Consider any class, say (125 – 130),
Then class size = 130 – 125 = 5
Hence, the class size is 5.
d. Number of students who have height less than 140 cm = 6 + 8 + 14 = 28
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संबंधित प्रश्न
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| 20-30 | 6 |
| 30-40 | 80 |
| 40-50 | 156 |
| 50-60 | 98 |
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60 |
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| Class Interval | 30 – 39 | 40 – 49 | 50 – 59 | 60 – 69 | 70 – 79 |
| Frequency | 24 | 16 | 09 | 15 | 20 |
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| Class-mark of marks | 325 | 375 | 425 | 475 | 525 | 575 |
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| No. of students | 6 | 15 | 12 | 10 | 18 | 9 |
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| 20 - 40 | 9 |
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