Answer:
Mr. Yardi needs to buy 5 packages of pens
Explanation:
He needs to buy 57 pens (19X3 = 57)
57/12 = 4.75
He neesd more than 4 packages So he needs to buy 5 packages and it will be 3 pens left so Mr Yardi can also have 3 pens if he wants
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