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In 1970, the ratio of the population living in metropolitan areas to

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Math Expert
Joined: 02 Sep 2009
Posts: 45429
In 1970, the ratio of the population living in metropolitan areas to [#permalink]

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29 Oct 2017, 01:10
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Difficulty:

15% (low)

Question Stats:

80% (00:56) correct 20% (01:19) wrong based on 44 sessions

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In 1970, the ratio of the population living in metropolitan areas to the population living in nonmetropolitan areas was approximately

(A) 1 to 2
(B) 2 to 3
(C) 7 to 5
(D) 2 to 1
(E) 3 to 1

Attachment:

2017-10-29_1208.png [ 108.96 KiB | Viewed 1254 times ]

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In 1970, the ratio of the population living in metropolitan areas to [#permalink]

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29 Oct 2017, 15:29
Bunuel wrote:

In 1970, the ratio of the population living in metropolitan areas to the population living in nonmetropolitan areas was approximately

(A) 1 to 2
(B) 2 to 3
(C) 7 to 5
(D) 2 to 1
(E) 3 to 1

Attachment:
2017-10-29_1208.png

1970, lower left corner graph:

Number of metropolitan people: about 145 million

NUMBER of non-metropolitan people:
195 (top line) - 145 (bottom line) =

Ratio of metropolitan to non-metropolitan?

$$\frac{145}{50} = approx{\frac{150}{50}}=\frac{3}{1}$$ or (3 to 1)

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Re: In 1970, the ratio of the population living in metropolitan areas to [#permalink]

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31 Oct 2017, 16:39
Bunuel wrote:

In 1970, the ratio of the population living in metropolitan areas to the population living in nonmetropolitan areas was approximately

(A) 1 to 2
(B) 2 to 3
(C) 7 to 5
(D) 2 to 1
(E) 3 to 1

Attachment:
2017-10-29_1208.png

Looking at the “Residence” graph (the lower left graph) and the vertical bar for 1970 in that graph, the ratio of the population living in metropolitan areas to the population living in non-metropolitan areas was approximately:

140/50 = 14/5 ≈ 3/1

Note: We can also see that the gray portion (metropolitan) of the vertical bar for 1970 is approximately 3 times as tall as the white portion (non-metropolitan) of that bar.

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Re: In 1970, the ratio of the population living in metropolitan areas to   [#permalink] 31 Oct 2017, 16:39
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