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Math Expert V
Joined: 02 Sep 2009
Posts: 55638
Between 1950 and 1960 the population of Country A increased by 3.5 mil  [#permalink]

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Difficulty:   25% (medium)

Question Stats: 70% (01:04) correct 30% (01:10) wrong based on 40 sessions

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Between 1950 and 1960 the population of Country A increased by 3.5 million people. If the amount of increase between 1960 and 1970 was 1.75 million more than the increase from 1950 to 1960, what was the total amount of increase in population in Country A between 1950 and 1970?

A. 1.75 million
B. 3.5 million
C. 5.25 million
D. 7 million
E. 8.75 million

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e-GMAT Representative D
Joined: 04 Jan 2015
Posts: 2888
Re: Between 1950 and 1960 the population of Country A increased by 3.5 mil  [#permalink]

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Solution

Given:
• Between 1950 and 1960 the population of country A increased by 3.5 million people
• The amount of increase between 1960 and 1970 was 1.75 million more than the increase from 1950 to 1960

To find:
• The total amount of increase in population in Country A between 1950 and 1970

Approach and Working:
Let the population in 1950 = x million
• Population in 1960 = x + 3.5 million
• Population in 1970 = x + 3.5 + 3.5 + 1.75 = x + 8.75 million

Therefore, increase in population from 1950 to 1970 = x + 8.75 – x = 8.75 million

Hence, the correct answer is Option E

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CEO  P
Joined: 18 Aug 2017
Posts: 3866
Location: India
Concentration: Sustainability, Marketing
GPA: 4
WE: Marketing (Energy and Utilities)
Re: Between 1950 and 1960 the population of Country A increased by 3.5 mil  [#permalink]

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Bunuel wrote:
Between 1950 and 1960 the population of Country A increased by 3.5 million people. If the amount of increase between 1960 and 1970 was 1.75 million more than the increase from 1950 to 1960, what was the total amount of increase in population in Country A between 1950 and 1970?

A. 1.75 million
B. 3.5 million
C. 5.25 million
D. 7 million
E. 8.75 million

let population before 1950 = x
1950-1960= x+3.5
1960-1970=x+3.5+1.75 = x+5.25+3.5 ; x+8.75

increase x+8.75-x ; 8.75 IMO E
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Director  D
Joined: 13 Mar 2017
Posts: 730
Location: India
Concentration: General Management, Entrepreneurship
GPA: 3.8
WE: Engineering (Energy and Utilities)
Re: Between 1950 and 1960 the population of Country A increased by 3.5 mil  [#permalink]

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Bunuel wrote:
Between 1950 and 1960 the population of Country A increased by 3.5 million people. If the amount of increase between 1960 and 1970 was 1.75 million more than the increase from 1950 to 1960, what was the total amount of increase in population in Country A between 1950 and 1970?

A. 1.75 million
B. 3.5 million
C. 5.25 million
D. 7 million
E. 8.75 million

Between 1950 and 1960 = 3.5m
Between 1960 and 1970 = 3.5 + 1.75 = 5.25m
Between 1950 and 1970 = 3.5 + 5.25 = 8.75m

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What I believe is : "Nothing is Impossible, Even Impossible says I'm Possible" : "Stay Hungry, Stay Foolish". Re: Between 1950 and 1960 the population of Country A increased by 3.5 mil   [#permalink] 10 Jun 2019, 04:54
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