In a market research project, 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 people were covered in the survey?

In a market research project, 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 people were covered in the survey?

Explanation
  • SHORT TRICK Percentage of uncertain individuals =[100−(20+60)]%=20% Since, 60% of x−20% of x=720 40% of x=720 100 40​x=720 x= 40 720×100​=1800 Hence the answer is 1800.