Fill in the blanks.
If the cost of $10$ pencils is $R s . 15$ , then the cost of $6$ pencils is ____ .

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Solution

If the cost of $10$ pencils is $R s . 15$ , then the cost of $6$ pencils is
Cost of $10$ pencils $= R s . 15$
Let cost of $6$ pencil $= R s . x$
$10 : 615 : x$
$10 x = 6 \times 5$
$x = 3$
Cost of $6$ pencils $= R s . 3$

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