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29 September, 15:54

There are 12 people in Mrs. Hilt's living room. 6 people are wearing socks and 4 people wearing shoes. 3 people are wearing both. How many people are bare feet?

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  1. 29 September, 15:55
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    3 people wearing both are also counted in the 6 with socks and 4 with shoes so you can't count them twice. What you do in stead is list:

    3 wearing both

    4 - 3 = 1 wearing just shoes

    6 - 3 = 3 wearing just socks

    total 7 so far so that leaves 5 others that must be barefoot.
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