If the price of pen decreases by 20%, then a man can buy 10 more pens for Rs 100. What is the new price (in Rs) of each pen?
A) 1 B) 2 C) 4 D) 5
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Answer:
the cost of bew pen is rs.4
becoz:
20%-x=10
20/100-10=x
therefore x=4
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