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1. The table shows the percentage of total population of a city in different age group. Study the table and answer the questions.

Age Group Percent

Up to 15
16 - 25
26 - 35
36 - 45
46 - 55
56 - 65 20.00
18.25
16.75
16.25
15.00
12.50

66 and above 1.25

If the different between the number of people in the age groups (46 - 55) and (16 - 25) is 0.975 million, then the total population (in millions) of the city is:

A. 27 millions

B. 30 millions

C. 22 millions

D. 25 millions

Solution:

Difference = 0.975 millions
(18.25 - 15)% = 0.975 millions
3.25% = 0.975

\begin{aligned} 1 % = \frac{0.975}{3.25} \\ 100 % = \frac{0.975}{3.25} \times 100 \\ = 30 millions \end{aligned}

Age Group	Percent
Up to 15 16 - 25 26 - 35 36 - 45 46 - 55 56 - 65	20.00 18.25 16.75 16.25 15.00 12.50
66 and above	1.25

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