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Family and Children
A family has several children. Each boy in this family has as many sisters as brothers but each girl has twice as many brothers as sisters. Find How many brothers and sisters are in the Family?
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Find Number of People
If there are some people, out of which 40% drink coffee, 40% drink tea, 50% drink milk, 10% drink all the three, 20% drink both coffee and tea, 20% drink both tea and milk, 20% drink both milk and coffee?