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Question

In a city, $$40\%$$ of the people are illiterate and $$60\%$$ are poor. Among the rich, $$10\%$$ are illiterate. What percentage of the poor population is illiterate?


A
36%
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B
40%
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C
60%
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D
None of these
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Solution

The correct option is B $$36\%$$
Percentage of rich people$$=100\%-60\%=40\%$$
Percentage of rich illiterates$$10\%\times40\%=4\%$$
Percentage of illiterate people$$=40\%$$
Percentage of poor illiterates$$40\%-4\%=36\%$$

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