Question
In the figure given below, a line segment is drawn parallel to one side of the triangle and the lengths of certain line-segment are marked. Find the value of x in the following:
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Answer
In figure (i)DE || BC
$\therefore\frac{\text{AD}}{\text{DB}}=\frac{\text{AE}}{\text{EC}}$
$\Rightarrow\frac{1}{\text{c}}=\frac{\text{d}}{\text{x}}$
$\therefore\text{x}=\text{cd}$
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0-10
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10-20
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20-30
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30-40
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40-50
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50-60
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60-70
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Frequency
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10
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20
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40
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25
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15
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