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Question

# Students went to buy notebooks from the school bookstore. Price of one notebook is Rs 5. Munnu wants to buy 5 notebooks, Appu wants to buy 7 notebooks, Sara wants to buy 4 notebooks and so on. How much money should a student carry when she or he goes to the bookstore to buy notebooks?

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Solution

## The letter 'm' stands for the number of notebooks a student wants to buy where m is a variable, which can take any value 1, 2, 3, 4, ... . The total cost of m notebooks is given by the rule: The total cost in rupees = 5 × number of note books required If Munnu wants to buy 5 notebooks, then taking m = 5, we say that Munnu should carry Rs. 5 × 5 or Rs. 25 with him to the school Similarly, if Appu wants to buy 7 notebook, then he should carry Rs (5 × 7) = Rs. 35 and Sara should carry Rs(5 × 4) = Rs. 20

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