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Question

On a certain date, Hannah invested 5,000atxpercentsimpleannualinterestandadifferentamountatypercentsimpleannualinterest.WhatamountdidHannahinvestatypercentsimpleannualinterest?(1)ThetotalamountofinterestearnedbyHannahstwoinvestmentsinoneyearwas900.
(2) Hannah invested the $5,000 at 6 percent simple annual interest.

A
Statement (1) alone is sufficient, but statement (2) alone is not sufficient.
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B
Statement (2) alone is sufficient, but statement (1) alone is not sufficient.
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C
Both statements together are sufficient, but neither statement alone is sufficient.
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D
Each statement alone is sufficient.
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E
Statements (1) and (2) together are not sufficient.
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Solution

The correct option is E Statements (1) and (2) together are not sufficient.
Let $A be the amount that Hannah invested at y percent. From statement 1, given that the sum of and is $900, or , it is clear that more than one value of A is possible. Thus, statement 1 is insufficient. From statement 2, given that x=6, it is clear that more than one value of A is possible. Thus, statement 2 is also insufficient. We get multiple vales of A even after combining both the statements.

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