hamidaakter936848
23.07.2019 •
Mathematics
Arestaurant offers three specials. a total of 40 of special a is order, 60 of special b, and 20 of special c. 7 customers order both a and b, 6 customers order both b and c, and 3 customers order both a and c. 2 customers order all three. how many customers were there total?
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