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19 Jul 2021, 08:15
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B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
78% (02:10) correct
22%
(02:57)
wrong
based on 50
sessions
History
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Time
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Not Attempted Yet
In City Y, 20 percent of the population consists of children, and 52 percent of the remainder consists of adult women. If the population of City Y is 1.2 million and every person is either an adult or a child, how many adult men are there in City Y?
A 360,000
B 460,800
C 480,000
D 499,200
E 520,000
A 360,000
B 460,800
C 480,000
D 499,200
E 520,000
19 Jul 2021, 09:49
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Solution:
We are given that there are \(1.2\) million people in the city.
\(20\) % of the population consists of children.
Which means that number of adult in the city \(= 80\) % of \(1.2\)
\(⇒ \frac{80}{100} \times 1.2\)
\(⇒ 0.8 \times 1.2\)
\(⇒ 0.96 \)
Thus there are \(0.96\) million adults in the city.
\(52\)% of the adult are women. This means \(48\)% of adults are men.
Thus number of adult men \(= 48\)% of \(0.96\).
\(⇒ \frac{48}{100} \times 0.96\)
\(⇒ 0.48 \times 0.96\)
\(⇒ 0.4608\)
\(0.4608\) million = \(0.4608 \times 10^6 = 460800\)
Hence the right answer is Option B.
We are given that there are \(1.2\) million people in the city.
\(20\) % of the population consists of children.
Which means that number of adult in the city \(= 80\) % of \(1.2\)
\(⇒ \frac{80}{100} \times 1.2\)
\(⇒ 0.8 \times 1.2\)
\(⇒ 0.96 \)
Thus there are \(0.96\) million adults in the city.
\(52\)% of the adult are women. This means \(48\)% of adults are men.
Thus number of adult men \(= 48\)% of \(0.96\).
\(⇒ \frac{48}{100} \times 0.96\)
\(⇒ 0.48 \times 0.96\)
\(⇒ 0.4608\)
\(0.4608\) million = \(0.4608 \times 10^6 = 460800\)
Hence the right answer is Option B.
19 Jul 2021, 09:56
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Of the 1,200,000 people, 80%, or 960,000, are adults. Slightly less than half of these adults are men, and only 460,800 makes sense.
