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A school has 6000 for maths books at 40 each. If the price rises to 50, the number of books falls from 150 to:
A130
B140
C120
D100
Answer & Solution
Correct answer: C. 120
1. Price and number vary inversely.
2. 6000 divided by 50 is 120.
3. 40 times 150 equals 50 times 120.
_Source: NCERT Class 8 Mathematics, Chapter 13, Direct and Inverse Proportions._
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