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In a market survey, 20% opted for Product A, 60% opted for Product B, while the remaining people were uncertain. 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 survey, 20% opted for Product A, 60% opted for Product B, while the remaining people were uncertain. 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? Correct Answer 1,800

Given:

People opted product A = 20%

People opted product B = 60%

People who is uncertain = 100% – (20% + 60%) = 20%

Calculation:

Let the number of people covered in the survey be x 

People opted product B = 60% of x

People who is uncertain = 20% of x

Now, A/Q

60% of x – 20% of x = 720

⇒ 40% of x = 720

⇒ x = (720 × 100)/40

⇒ x = 1800

∴ The total number of people covered in the survey is 1800

 

People opted for product B = 60%

People who is uncertain = 100% – (20% + 60%) = 20%

40% = 720 

⇒ 100% = (720 × 100%)/40% = 1800

∴ The total number of people covered in the survey is 1800

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