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27 Sep 2018, 05:36
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
90% (02:19) correct
10%
(02:28)
wrong
based on 68
sessions
History
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Not Attempted Yet
A sum of $100,000 was invested in two deposits at simple interest rates of 3 percent and 4 percent, respectively. If the total interest on the two certificates was $3600 at the end of one year, what fractional part of the 100,000 was invested at 4 percent?
(A) 5/8
(B) 1/5
(C) 2/3
(D) 3/5
(E) 3/7
(A) 5/8
(B) 1/5
(C) 2/3
(D) 3/5
(E) 3/7
27 Sep 2018, 06:24
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Bunuel
Let, SUm invested at 4% = x
i.e.e Sum invested at 3% = 100000-x
\((4/100)*x + (3/100)*(100000-x) = 3600\)
i.e. \(4x+300000-3x = 360000\)
i.e. \(x = 60000\)
\(Fraction = 60000/100000 = 3/5\)
Answer: Option D
27 Sep 2018, 07:42
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Bunuel
3-----------------------------------4
----------------3.6------------------
0.4--------------------------------0.6
AMount invested at 4% ROI is \(\frac{0.60}{(0.40 + 0.60)}= \frac{3}{5}\), Answer must be (D)
