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 ?
Let the total population be `x` . Then,
poor population= `60/100 x = 3/5 x` . Illiterate population = `40/100 x = 2/5 x`
Illiterate rich = 10% of (100 - 60)% of `x = (10/100 xx 40/100 xx x) = x/25`
Illiterate poor = `(2/5 x - x/25) = (9x)/(25)`
`:.` Required percentage = `((9x)/(25) xx (5)/(3x) xx 100)`% = 60%.
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