alleryThe inverse ratio of 11 : 15 is
A22 : 30
B11 : 15
C121 : 225
D15 : 11
Answer & Solution
Correct answer: D. 15 : 11
1. By definition, the inverse of a ratio a : b is b : a.
2. Given ratio is 11 : 15, so the inverse swaps the two terms.
3. Inverse ratio = 15 : 11.
4. Squaring (option C) and doubling (option D) are not inverses, so they are ruled out.
_Source: ICAI BoS Foundation Paper 3, Ch 1 Unit I 'Ratio', p.5 Ex.1(A) Q1_
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