Mathematics, 26.12.2021 01:20, slippedsumo

The Wilson family invited 100 relatives to their Christmas party. 90 guests had Dutch heritage, 80 had German heritage and 75 had English heritage. What is the minimum number of people who claimed ancestry from all three heritages? What is the formula i use to find out the answer of the question? and how do i find out the answer?

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The Wilson family invited 100 relatives to their Christmas party. 90 guests had Dutch heritage, 80 h...