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The cost of 16 pens and 8 pencils is Rs.352 and the cost of 4 pens and 4 pencils is Rs.96. Find the cost of each
pen?

Rs.32
Rs.28
Rs.36
None of these
Explanation:

Let the cost of each pen and pencil be `p` and `q` respectively.

16p + 8q = 352 --- (1)

4p + 4q = 96

8p + 8q = 192 --- (2)

(1) - (2) $\Rightarrow$ 8p = 160

$\Rightarrow$ p = 20

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