In a market survey 20% respondents opted for product A whereas 60% opted for product B. the remaining individuals were not certain. If the difference in number between those who opted for product B and those who were uncertain was 720. How many individuals were covered in the survey?
Solution
Correct Answer: Option B
Uncertain individuals এর শতকরা = ১০০% - (২০+৬০)% = ২০%
মনেকরি, নির্ণেয় সংখ্যা = x
প্রশ্নেমতে,
x এর ৬০% - x এর ২০% = ৭২০
⇒ x এর ৬০/১০০ - x এর ২০/১০০ = ৭২০
⇒ ৩x/৫ - x/৫ = ৭২০
⇒ ২x/৫ = ৭২০
x = ১৮০০
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