6) A marketing firm determined that , of 240 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?	Answers.
A) a) 15
B) b) 20
C) c) 25
D) d) 40
E) e) 45
160 = At least one of Soap A or B   Both brands = x   Brand B = 3x   =&gt; 60 + x + 3x = 160   =&gt; 4x = 100   =&gt; x = 25   Answer - c) 25
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6) A marketing firm determined that , of 240 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?