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Are at least 20 percent of the people in the city H who are 24 Nov 2005, 22:58
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Are at least 20 percent of the people in the city H who are at least 30 years old bilingual?

1) In city H,30 percent of population is at least 30 years old.

2) In city H,of the population 30 years old or older,18 percent of the women and 17 percent of the men are bilingula



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Are at least 20 percent of the people in the city H who are 24 Nov 2005, 23:14
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1. No bilingual information. Insuff
2. No population demographics. Insuff

Between C and E is tricky.

Together, we don`t know the male/female breakdown. What if there are only 1% males (or females) over 30??

(E)
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Are at least 20 percent of the people in the city H who are 25 Nov 2005, 02:11
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:evil: its B)...there is no way that at least 20% of the ppl over 30 are bilingual...assume 100 ppl...30% are over 30...even the case that there are only women would reach the scenario that there are at lest 20%....
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Are at least 20 percent of the people in the city H who are Updated on: 25 Nov 2005, 03:44
Originally posted by laxieqv on 25 Nov 2005, 02:27.
Last edited by laxieqv on 25 Nov 2005, 03:44, edited 2 times in total.
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Are at least 20 percent of the people in the city H who are at least 30 years old bilingual?

1) In city H,30 percent of population is at least 30 years old.

2) In city H,of the population 30 years old or older,18 percent of the women and 17 percent of the men are bilingula
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well , let a and b be the number of women and men in the population 30 years old or older.
we have : a+b=30%A (A is the total population)
the total bilingual population(>=30 years old) is : 0.18a+0.17b < 0.18a+0.18 b = 0.18(a+b)=0.18*30%A = 5.4%A -------> No for the question --->suff.

well, i was having dinner and rushed back to edit sth :p

consider 2
Let x, y be the total number of women and men in the city
0.18a+0.17b < 0.18a+0.18 b<= 0.18 x +0.18y= 0.18(x+y)=0.18*100%A = 18%A <20% A ---> No for the answer--->suff

Yes, it's B. How come i keep neglecting the facts provided :evil:
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Are at least 20 percent of the people in the city H who are 25 Nov 2005, 02:31
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christoph
:evil: its B)...there is no way that at least 20% of the ppl over 30 are bilingual...assume 100 ppl...30% are over 30...even the case that there are only women would reach the scenario that there are at lest 20%....
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I'm sure you mean C :wink: coz you use statement 1 also
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Are at least 20 percent of the people in the city H who are 25 Nov 2005, 03:07
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laxieqv
christoph
:evil: its B)...there is no way that at least 20% of the ppl over 30 are bilingual...assume 100 ppl...30% are over 30...even the case that there are only women would reach the scenario that there are at lest 20%....

I'm sure you mean C :wink: coz you use statement 1 also
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even without statement 1 its B)...

question together with statement 2) is 0,18w+0.17m>=0,2m+0,2w ? => 0>=0,02w+0,03m ? suff
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Are at least 20 percent of the people in the city H who are 25 Nov 2005, 03:46
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well, i was having dinner and rushed back to edit sth :p

consider 2
Let x, y be the total number of women and men in the city
0.18a+0.17b < 0.18a+0.18 b<= 0.18 x +0.18y= 0.18(x+y)=0.18*100%A = 18%A <20% A ---> No for the answer--->suff

Yes, it's B. How come i keep neglecting the facts provided :evil:
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Are at least 20 percent of the people in the city H who are 25 Nov 2005, 16:09
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Alright guys ....OA is B .
thx for clear explanation .....



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