6) A marketing firm determined that , of 300 households surveyed, 80 used neither Brand A nor Brand B soap.60 used only Brand A soap and for every household that used both brands of soap, 3 used only brand B soap.how many of the 200 household surveyed used both brands of soap?	Choose the correct choice from the following choices: A) a) 15 B) b) 20 C) c) 30 D) d) 40 E) e) 45
220 = At least one of Soap A or B   Both brands = x   Brand B = 3x   =&gt; 60 + x + 3x = 220   =&gt; 4x = 160   =&gt; x = 40   Answer - d) 40
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6) A marketing firm determined that , of 300 households surveyed, 80 used neither Brand A nor Brand B soap.60 used only Brand A soap and for every household that used both brands of soap, 3 used only brand B soap.how many of the 200 household surveyed used both brands of soap?