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A certain investment doubled in value every 9 years. If Saidah had $25
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30 Jul 2018, 00:55
30 Jul 2018, 00:55
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A certain investment doubled in value every 9 years. If Saidah had $25,125 in the investment when she was 27 years old, what was the value of the investment when she retired at 63 years old?
(A) $50,250
(B) $150,750
(C) $201,000
(D) $251,250
(E) $402,000
(A) $50,250
(B) $150,750
(C) $201,000
(D) $251,250
(E) $402,000
Joined: 21 Jan 2015
Posts: 421
Given Kudos: 82
Location: India
Concentration: Strategy, Marketing
GMAT 1: 620 Q48 V28 
GMAT 2: 690 Q49 V35
WE:Sales (Consumer Packaged Goods)
Re: A certain investment doubled in value every 9 years. If Saidah had $25
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30 Jul 2018, 01:04
30 Jul 2018, 01:04
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Ans; E
X'= (2)^n * X
here time duration to double is 9 years : so from 27 to 63 total 4 Double time durations. so n=4
X' = 2^4 * 25125 = 16*25125 = $402,000
X'= (2)^n * X
here time duration to double is 9 years : so from 27 to 63 total 4 Double time durations. so n=4
X' = 2^4 * 25125 = 16*25125 = $402,000
Bunuel
A certain investment doubled in value every 9 years. If Saidah had $25,125 in the investment when she was 27 years old, what was the value of the investment when she retired at 63 years old?
(A) $50,250
(B) $150,750
(C) $201,000
(D) $251,250
(E) $402,000
(A) $50,250
(B) $150,750
(C) $201,000
(D) $251,250
(E) $402,000
Joined: 26 Mar 2013
Posts: 2454
Given Kudos: 641
Concentration: Operations, Strategy
Schools: Erasmus (II)
Re: A certain investment doubled in value every 9 years. If Saidah had $25
[#permalink]
31 Jul 2018, 01:06
31 Jul 2018, 01:06
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Bookmarks
Bunuel
A certain investment doubled in value every 9 years. If Saidah had $25,125 in the investment when she was 27 years old, what was the value of the investment when she retired at 63 years old?
(A) $50,250
(B) $150,750
(C) $201,000
(D) $251,250
(E) $402,000
(A) $50,250
(B) $150,750
(C) $201,000
(D) $251,250
(E) $402,000
Number of times the investment is doubled = (63-27)/ 9 = 4
The answer choices are spread out so we can make some approximation. So Consider Sadish has $25,000
Period 1: 50,000
Period 2: 100,00
Period 3: 200,000
Period 4 : 400,000
The closes answer is $402,000
Answer: E
