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In an engineer's colony of Delhi are 1440 members, out of which 150 engineers read only English newspaper. 300 engineers read-only Hindi newspaper and 400 engineers read-only Urdu newspaper. The total number of members who read all three newspapers are 350. 100 engineers read only English and Hindi newspaper. 50 Engineers read only Hindi and Urdu newspaper while 90 engineers read only Urdu and English newspaper.