In a group of persons, 11 persons speak ...

In a group of persons, 11 persons speak Kannada, 20 persons speak Tamil and Il persons speak Telugu. In that group. if two persons speak two languages and one person speak all the languages, then how many persons are there in the group?

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The correct Answer is:

Total number of persons
= 19 + 1 + 1 + 1 + 10 + 10 = 42

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