If 3 notebooks cost Rs. 45, what is the cost of 8 notebooks at the same rate?
Correct answer: C. Rs. 120
- A. Rs. 96
- B. Rs. 108
- C. Rs. 120
- D. Rs. 135
Explanation
One notebook costs Rs. 15 because 45 is divided by 3. Eight notebooks therefore cost 8 × 15 = Rs. 120.
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About Basic Mathematics: Fractions, Percentages, Ratios and Indices
Work with fractions includes simplification, conversion, operations and comparison, while percentages cover increases, decreases, profit, loss and reverse percentage calculations. Ratios and proportions describe relationships between quantities, and indices cover laws of exponents, zero and negative powers, fractional indices, and scientific notation.
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