Question

in a market20% opted for B,the remaining individuals were uncertain,if the difference between those opted for B and those who were uncertain is 720,then how many individuals were covered in survey?

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Answer 1

Unsure persons=100−[60+20]=20%

If the number of persons included in survey be x, then x×(60−20)%=720

=> x×40100=720

=>x=720×10040=1800