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In a shop, 380 people buy socks, 150 people buy shoes, and 200 people buy belts. If there are a total of 580 people who bought either socks or shoes or belts and only 30 people bought all the three things? So, how many people bought exactly two things? |
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Answer» In a shop, 380 people buy socks, 150 people buy shoes, and 200 people buy belts. If there are a total of 580 people who bought either socks or shoes or belts and only 30 people bought all the three things? So, how many people bought exactly two things? |
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