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प्रश्न
A paint company asked a group of students about their favourite colours and made a pie chart of their findings. Use the information to answer the following questions.
How many students liked green colour?
उत्तर
| Class Intervals | Tally Marks | Frequency |
| 150 − 200 | II | 2 |
| 200 − 250 | III | 3 |
| 250 − 300 | IIII I | 6 |
| 300 − 350 | IIII | 5 |
| 350 − 400 | IIII II | 7 |
| 400 − 450 | IIII | 4 |
| 450 − 500 | III | 3 |
| Total | 30 | |
Total percentage of students = 100%
∴ 50 students = 100% – (30% + 20% + 25% + 15%)
= 100% – 90%
50 students = 10%
10% of total students = 50
∴ `10/100` (Total students) = 50
Total students = `(50 xx 100)/10` = 500
Total students = 500
15% of the students liked green colour.
`15/100 xx 500` = 75 students liked green colour.
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