In a survey one fourth young girl like sour-taste only and one third like chilly-taste. If 50 of them do not like both the
tastes, find the total number of young girl with the help of
Venn diagram. Ans: 120
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Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?