OCR MEI Statistics 1 1.06 A Trickier Venn Diagram Problem

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Is there a reason you work with decimals rather than percentages in your Venn diagram? Saw a mark scheme from ocr that seemed to insist the answer was a decimal or fraction (not a percentage). Been trying to Google an answer with no luck!

alisonemma
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Hey Jack what if it said at least one of the languages, would it be the same?

kervensmartin