Bunuel wrote:
An investor invests $10,000 at R percent simple annual interest and a different amount at P percent simple annual interest. What total amount did the investor invest?
(1) The total amount of interest earned by the two investments in one year is $1,800.
(2) R = 6.
The Ans. is E
(1) The total interest will not give the principal amount as long as P and R are unknown. Therefore insufficient.
(2) we still dont know the Prinicipal because P is unknown. Therefore insufficient.
(1) and (2) together
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