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Table shows the number of persons in six cities A to F in 2020, with the male:female and literate:illiterate ratios.

CityPersonsM:FLiterate:Illiterate
A5000003:21:4
B3600004:64:1
C2800003:42:5
D4500005:43:2
E5000002:32:3
F3000002:17:3

The number of illiterates is more than one lakh in

AAll the six cities
BExactly three cities
CExactly four cities ✓ Correct
DExactly two cities
Correct answer: (C) Exactly four cities
Explanation

The illiterates exceed one lakh in exactly four cities, so the answer is exactly four cities.

City A has 4,00,000 illiterates and City C has 2,00,000, both above one lakh.

City D has 1,80,000 illiterates and City E has 3,00,000, both above one lakh.

So these four cities each have more than one lakh illiterates.

City B has only 72,000 illiterates, which is below one lakh.

City F has only 90,000 illiterates, which is below one lakh.

So exactly four cities have more than one lakh illiterates.

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