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Mike@Magoosh
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Jackson invested $300,000, dividing it all unequally between Account P and Account Q. At the end of the year, it turned out that Account P had earned 12% interest and Account Q had earned 25% interest. If Jackson earned a total of $60,000 in interest between the two accounts, which of the following is approximately the amount he put in account P?
(A) $115,384
(B) $120,000
(C) $121,072
(D) $124,129
(E) $130,000
This is a hard problem without a calculator, and of course you don't get a calculator on the GMAT Q section. It's a good problem on which to use estimation:
https://magoosh.com/gmat/2012/the-power- ... mat-quant/
It's also a good problem on which to use backsolving:
https://magoosh.com/gmat/2013/backsolving-on-gmat-math/
That latter link has the OA & OE for this particular question.
Mike
(A) $115,384
(B) $120,000
(C) $121,072
(D) $124,129
(E) $130,000
This is a hard problem without a calculator, and of course you don't get a calculator on the GMAT Q section. It's a good problem on which to use estimation:
https://magoosh.com/gmat/2012/the-power- ... mat-quant/
It's also a good problem on which to use backsolving:
https://magoosh.com/gmat/2013/backsolving-on-gmat-math/
That latter link has the OA & OE for this particular question.
Mike
Magoosh GMAT Instructor
https://gmat.magoosh.com/
https://gmat.magoosh.com/
