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Is the number of members of Club X greater than the number

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Is the number of members of Club X greater than the number [#permalink] New post 27 Jul 2012, 18:33
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100% (02:28) correct 0% (00:00) wrong based on 6 sessions
I'm having trouble doing the following problem in OG 12.

89. Is the number of members of Club X greater than the
number of members of Club Y ?
(1) Of the members of Club X, 20 percent are also
members of Club Y.
(2) Of the members of Club Y, 30 percent are also
members of Club X.

121. In the xy-plane, region R consists of all the points (x,y)
such that 2x + 3y ≤ 6. Is the point (r,s) in region R ?
(1) 3r + 2s = 6
(2) r ≤ 3 and s ≤ 2

161. Beginning in January of last year, Carl made deposits
of $120 into his account on the 15th of each month
for several consecutive months and then made
withdrawals of $50 from the account on the 15th of
each of the remaining months of last year. There were
no other transactions in the account last year. If the
closing balance of Carl’s account for May of last year
was $2,600, what was the range of the monthly
closing balances of Carl’s account last year?
(1) Last year the closing balance of Carl’s account
for April was less than $2,625.
(2) Last year the closing balance of Carl’s account
for June was less than $2,675.

Will appreciate if anyone explains them better than the book.

Last edited by Bunuel on 28 Jul 2012, 00:46, edited 1 time in total.
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Re: OG 12 DS Questions [#permalink] New post 28 Jul 2012, 00:48
Expert's post
Please read carefully and follow: rules-for-posting-please-read-this-before-posting-133935.html

Question #1 is discussed here: is-the-number-of-members-of-club-x-greater-than-the-number-128641.html
Question #2 is discussed here: in-the-xy-plane-region-r-consists-of-all-the-points-x-y-102233.html
Question #3 is discussed here: beginning-in-january-of-last-year-carl-made-deposits-of-126406.html
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Re: OG 12 DS Questions   [#permalink] 28 Jul 2012, 00:48
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