written by staff members

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written by staff members

by sanju09 » Mon Jul 26, 2010 2:32 am
Fifty percent of the articles in a certain magazine are written by staff members. Sixty percent of the articles are on current affairs. If 75 percent of the articles on current affairs are written by staff members with more than 5 years experience of journalism, how many of the articles on current affairs are written by staff members with more than 5 years experience?

1. 20 articles are written by staff members.
2. Of the articles on topics other than current affairs, 50 percent are by staff members with less than 5 years experience.

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by outreach » Mon Jul 26, 2010 3:17 am
A

20 articles by staff members
total 40 articles
24 articles will be on current affair
18 articles will be written by staff members with more than 5
sanju09 wrote:Fifty percent of the articles in a certain magazine are written by staff members. Sixty percent of the articles are on current affairs. If 75 percent of the articles on current affairs are written by staff members with more than 5 years experience of journalism, how many of the articles on current affairs are written by staff members with more than 5 years experience?

1. 20 articles are written by staff members.
2. Of the articles on topics other than current affairs, 50 percent are by staff members with less than 5 years experience.

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by selango » Mon Jul 26, 2010 10:31 am
Let number of articles be X

1/2*X-written by staff

3/5*X-current affairs

0.45X-current affairs written by staff>5 yrs experience

x?

stmt1,

1/2*X=20

X=40

Sufficient

stmt2,

2/5*X-articles other than current affairs

1/5*X-writen by staff<5yrs exp

we dont know abt current affairs staff and more than 5 yrs exp

Insufficient

Pick A
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