Question

. In a market survey, 20% opted for product A whereas 60% opted for product B. The remaining individuals were not certain. If the difference between those who opted for product B and those who were uncertain was 720, how many individuals were covered in the survey ?

Answer 1

let x be the number of people in the survey.
20% were uncertain
so
0.60 x - 0.2x = 720
0.40x = 720
x = 720 / 0.4
= 1800