Question
$\frac{1}{3} x+\frac{1}{4} y=4 ; \frac{5}{6} x-\frac{1}{8} y=4$
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Class interval
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0-10
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10-20 | 20-30 | 30-40 | 40-50 |
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Frequency
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9 | 12 |
15
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10
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14 |