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At the beginning of 1990, Jon and Krista each purchased a

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aditi1903
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At the beginning of 1990, Jon and Krista each purchased a [#permalink] New post  Updated on: 11 Oct 2012, 23:51
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At the beginning of 1990, Jon and Krista each purchased a certificate of deposit that paid the same rate of interest, and each held the certificate of deposit through the end of 1990. If Jon invested x dollars and Krista invested $10,000, and if Jon earned interest in 1990 totaling $1200, what was the amount of interest that Krista earned on her $10,000 investment?

(1) The rate of interest on the certificate of deposit that Jon and Krista each purchased was 6 percent.
(2) In 1990, Jon invested $20,000 in the certificate of deposit.
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Originally posted by aditi1903 on 11 Oct 2012, 23:19.
Last edited by Bunuel on 11 Oct 2012, 23:51, edited 1 time in total.
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Re: At the beginning of 1990, Jon and Krista each purchased a [#permalink] New post  12 Oct 2012, 00:00
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At the beginning of 1990, Jon and Krista each purchased a certificate of deposit that paid the same rate of interest, and each held the certificate of deposit through the end of 1990. If Jon invested x dollars and Krista invested $10,000, and if Jon earned interest in 1990 totaling $1200, what was the amount of interest that Krista earned on her $10,000 investment?

Jon: x dollars --> $1200;
Krista: $10,000 --> ?

(1) The rate of interest on the certificate of deposit that Jon and Krista each purchased was 6 percent. We can calculate the amount of interest on Krista's $10,000. Sufficient.

(2) In 1990, Jon invested $20,000 in the certificate of deposit. Thus Jon earned $1200 on his $20,000, which is 6%. Since we are told that their investments paid the same rate of interest, then we can calculate the amount of interest on Krista's $10,000. Sufficient.

Answer: D.
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Re: At the beginning of 1990, Jon and Krista each purchased a [#permalink] New post  28 Dec 2022, 12:05
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Re: At the beginning of 1990, Jon and Krista each purchased a [#permalink]
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