the cost of one pen is Rs 9 , then the cost of n pens is
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Answer:
9n
Step-by-step explanation:
The cost of one pen is 9. To find the cost of n such pens, we must multiply the number by 9. So the cost of n pens will be ₹9n.
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1 pen = Rs. 9
n pens = 9 x n
= Rs. 9n
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