Question

In a room containing 28 people, there are 18 people who speak English, 15 people
who speak Hindi and 22 people who speak Kannada, 9 persons speak both English
and Hindi, 11 persons speak both Hindi and Kannada where as 13 person speak
both Kannada and English. How+ many people speak all the three languages?

Answer 1

Answer:

Let X was the people who speaks all three languages.

Total number of people = (Hindi + English + Kannad) - (Hindi and English + Hindi and Kannad + Kannad and English) + X

28 = (15 + 22 + 18) - (9 + 11 + 13) +X

X = 28 - 55 + 33

X = 6.

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