Question
A recent survey for XYZ city showed that 56 percent of
the population is below 21 years (exactly 21 years old not included), 25 percent of the rest of people is between 21-60 years and the rest of the population is more than 60 years. Then, what is the percentage of people who are more than 60 years of age in XYZ city?Solution
Let total population = 1000 Below 21 years of age = 56% of 1000 = 560 Remaining = 440 Between (21-60) = 25% of 440 = 110 Remaining = 330 (i.e., above 60 years age)  Percentage of people above 60 = (330/1000) × 100                                                   = 33%
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