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15 Jan 2019, 01:21
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
55%
(hard)
Question Stats:
64% (01:43) correct
36%
(01:40)
wrong
based on 642
sessions
History
Date
Time
Result
Not Attempted Yet
For which of the following expressions would the value be greater if 160 were replaced by 120 ?
I. \(1000 - 160\)
II. \(\frac{160}{1+160}\)
III. \(\frac{1}{1-\frac{1}{160}}\)
A. None
B. I only
C. III only
D. I and II
E. I and III
I. \(1000 - 160\)
II. \(\frac{160}{1+160}\)
III. \(\frac{1}{1-\frac{1}{160}}\)
A. None
B. I only
C. III only
D. I and II
E. I and III
15 Jan 2019, 01:50
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The ans to this will have to E,
Best way to check is by using small numbers, i took 2& 3,
Cheers, I really want some Kudos, so if this helped you can you please give me kudos
Best way to check is by using small numbers, i took 2& 3,
Cheers, I really want some Kudos, so if this helped you can you please give me kudos
General Discussion
15 Jan 2019, 06:41
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Solution
Given:
- • Three expressions
To find:
- • Which among them is greater when 160 is replaced by 120 in all of them
Approach and Working:
I. 1000 – 160 = 840, and 1000 – 120 = 880.
- • Thus, 880 > 840
II. 160/1+160 = 160/161, and 120/1+120 = 120/121
- • Thus, 120/121 < 160/161
III. 1/1-1/160 = 160/159, and 1/1-1/120 = 120/119
- • Thus, 120/119 > 160/159
Hence, the correct answer is Option E
Answer: E
