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If a dollars were invested at 10% simple annual interest, which of the

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Bunuel
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If a dollars were invested at 10% simple annual interest, which of the [#permalink] New post   26 Apr 2017, 08:22
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If a dollars were invested at 10% simple annual interest, which of the following, in terms of a, is the total value of the investment, in dollars, after a year?

A. 0.1a
B. 0.9a
C. a
D. 1.1a
E. 1.2a
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D
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Re: If a dollars were invested at 10% simple annual interest, which of the [#permalink] New post   26 Apr 2017, 11:03
A = P(1+RT/100)
= a(1+10/100)
= a(1+0.1)
= 1.1a

Answer is D. 1.1a
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Re: If a dollars were invested at 10% simple annual interest, which of the [#permalink] New post   16 May 2017, 05:22
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If a dollars were invested at 10% simple annual interest, which of the following, in terms of a, is the total value of the investment, in dollars, after a year?

Simple interest = \(\frac{P*T*R}{100}\) (P = Principal , R = Rate of interest , T = Time) = \(\frac{a * 10 *1}{100}\) = 0.1a

Therefore the total amount = P + SI = a + 0.1a = 1.1a
...... Answer D ........

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Re: If a dollars were invested at 10% simple annual interest, which of the [#permalink] New post   16 May 2017, 08:37
Bunuel wrote:
If a dollars were invested at 10% simple annual interest, which of the following, in terms of a, is the total value of the investment, in dollars, after a year?

A. 0.1a
B. 0.9a
C. a
D. 1.1a
E. 1.2a


Amount after 1 year \(= a + \frac{a*1*10}{100}\)
Amount after 1 year \(= a + 0.1a\)
Amount after 1 year \(= 1.1a\)

Thus, answer must be (D) 1.1a
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Re: If a dollars were invested at 10% simple annual interest, which of the [#permalink]
16 May 2017, 08:37
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