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At the local grocery store, apples normally cost 40 cents

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by BTGmoderatorLU » Thu Nov 01, 2018 2:01 pm

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Source: Princeton Review

At the local grocery store, apples normally cost 40 cents each. During a recent sale, the price was reduced to 3 apples for a dollar. How much money would be saved by purchasing 30 apples at the sale price?

A. $1
B. $1.50
C. $2
D. $2.50
E. $3

The OA is C.
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by kaylajiang » Thu Nov 01, 2018 4:44 pm
My solution:
Original price for an apple is 0.4 dollars, during the sale, 3 apples will cost $1.
To purchase 30 apples, the original price will be 0.4*30=$12, the discounted price will be $10. So the difference will be $2
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by Scott@TargetTestPrep » Sat Nov 03, 2018 5:04 pm
BTGmoderatorLU wrote:Source: Princeton Review

At the local grocery store, apples normally cost 40 cents each. During a recent sale, the price was reduced to 3 apples for a dollar. How much money would be saved by purchasing 30 apples at the sale price?

A. $1
B. $1.50
C. $2
D. $2.50
E. $3
The normal price of 30 apples is 30 x 40 = 1200 cents, or $12. The sale price of 30 apples is 30/3 x 1 = $10. So 12 - 10 = $2 would be saved by purchasing 30 apples at the sale price.

Answer: C

Scott Woodbury-Stewart
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At the local grocery store, apples normally cost 40 cents ea

by fskilnik@GMATH » Sun Nov 04, 2018 11:50 am
BTGmoderatorLU wrote:Source: Princeton Review

At the local grocery store, apples normally cost 40 cents each. During a recent sale, the price was reduced to 3 apples for a dollar. How much money would be saved by purchasing 30 apples at the sale price?

A. $1
B. $1.50
C. $2
D. $2.50
E. $3
Trivial application of UNITS CONTROL, one of the most powerful tools of our method!

$$?\,\,\,\left[ \$ \right]\,\,\, = \,\,\,30\,\,{\rm{apples}}\,\,\,\left( {{{\,40\,\,{\rm{cents}}\,} \over {1\,\,{\rm{apple}}}}} \right)\,\,\,\left( {{{1\,\,{\rm{\$ }}} \over {\,100\,\,{\rm{cents}}\,}}} \right)\,\,\,\, - \,\,\,30\,\,{\rm{apples}}\,\,\left( {{{1\,\,{\rm{\$ }}} \over {\,3\,\,{\rm{apples}}\,}}} \right)\,\,\,\,\, = \,\,\,3 \cdot 4 - 10\,\,\, = \,\,\,2\,\,\,\,\,\left[ \$ \right]$$

This solution follows the notations and rationale taught in the GMATH method.

Regards,
Fabio.
Fabio Skilnik :: GMATH method creator ( Math for the GMAT)
English-speakers :: https://www.gmath.net
Portuguese-speakers :: https://www.gmath.com.br
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by Scott@TargetTestPrep » Sun Nov 04, 2018 5:01 pm
BTGmoderatorLU wrote:Source: Princeton Review

At the local grocery store, apples normally cost 40 cents each. During a recent sale, the price was reduced to 3 apples for a dollar. How much money would be saved by purchasing 30 apples at the sale price?

A. $1
B. $1.50
C. $2
D. $2.50
E. $3
At regular price, 30 apples cost 30 x 0.40 = 12 dollars.

At the sale price, 30 apples cost 30 x 1/3 = 10 dollars.

So at the sale price, a total of 2 dollars is saved.

Answer: C

Scott Woodbury-Stewart
Founder and CEO
[email protected]

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