Let's say each box contains x pens. Therefore, Noorie buys a total of 16x pens.
She gives 10 pens to each of her friends, so she gives away a total of 10 * 10 = 100 pens.
Therefore, the number of pens Noorie has left is 16x - 100.
Noorie buys 16 boxes of pens.each box contains m pens.she gives 10 to her friends
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