Set Theory

At a certain conference of 100 people, there are 29 Indian women and 23 Indian men. Of these Indian people, 4 are doctors and 24 are either men or
doctors. There are no foreign doctors.

How many foreigners are attending the conference?
(1) 51 (2) 55 (3) 52 (4) 48

How many women doctors are attending the conference?


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