question!! i think this is algebra...  TOPIC_SOLVED

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question!! i think this is algebra...

Postby foood on Sat Dec 31, 2011 8:45 am

jamie had x dollars in the bank. he took out 1/2 of it. then he took out 1/3 of the remaining sum to get something else. what fraction of the original amount remained in his account?

a)1/6
b)1/5
c)1/4
d)1/3

ummm so i did 1-(1/2-1/3) which i got 1/6...a)
my answer sheet says d)

(this is from a isee test prep book by the princeton review.....)
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Postby stapel_eliz on Sat Dec 31, 2011 11:19 am

foood wrote:jamie had x dollars in the bank. he took out 1/2 of it. then he took out 1/3 of the remaining sum to get something else. what fraction of the original amount remained in his account?

i did 1-(1/2-1/3)

Does the exercise say that "then he took one-third of the original sum", or that "then he took one-third of the remaining sum"? Your expression reflects the former.
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Re:

Postby foood on Sun Jan 01, 2012 3:45 am

stapel_eliz wrote:
foood wrote:jamie had x dollars in the bank. he took out 1/2 of it. then he took out 1/3 of the remaining sum to get something else. what fraction of the original amount remained in his account?

i did 1-(1/2-1/3)

Does the exercise say that "then he took one-third of the original sum", or that "then he took one-third of the remaining sum"? Your expression reflects the former.



it says "of the remaining sum"
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Re: question!! i think this is algebra...  TOPIC_SOLVED

Postby buddy on Sun Jan 01, 2012 11:39 am

foood wrote:it says "of the remaining sum"

so get the "remaining sum" and do 1/3 to that
you can see how to do "1/3 of" here
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