In a sample of associates at a law firm, 30 percent are

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BTGmoderatorLU: Moderator; Posts: 2505; Joined: Sun Oct 15, 2017 1:50 pm; Followed by:6 members

In a sample of associates at a law firm, 30 percent are

by BTGmoderatorLU » Tue May 22, 2018 1:20 pm

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In a sample of associates at a law firm, 30 percent are second-year associates, and 60 percent are not first-year associates. What percentage of the associates at the law firm have been there for more than two years?

A. 10
B. 20
C. 30
D. 40
E. 50

The OA is C.

Please, can anyone assist me with this PS question? I need help to solve it? Thanks in advance!

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Source: Beat The GMAT — Problem Solving | Tue May 22, 2018 1:20 pm

GMAT/MBA Expert

[email protected]: Elite Legendary Member; Posts: 10392; Joined: Sun Jun 23, 2013 6:38 pm; Location: Palo Alto, CA; Thanked: 2867 times; Followed by:511 members; GMAT Score:800

by [email protected] » Tue May 22, 2018 3:01 pm

Hi All,

We're told that in a sample of associates at a law firm, 30 percent are second-year associates, and 60 percent are not first-year associates. We're asked for the percentage of the associates at the law firm that have been there for MORE than two years. Although this prompt has a bit of 'odd' wording, we're meant to assume that the 'sample' is actually a reference to ALL associates at the law firm. We can answer this question by TESTing VALUES.

IF there are 100 total associates...
30% = 30 are second-year associates
60% = 60 are NOT first-year associates. These 60 people include the 30 people who we already know are second-year associates, so there are 60-30 = 30 other people who are NOT first-year and NOT second-year associates. 100 - 60 = 40 are first-year associates.

Of the 100 total associates, there are:
40 first-year associates
30 second-year associates
30 associates who have been there LONGER than 2 years. Thus, the answer to the question is 30/100 = 30%

Final Answer: C

GMAT assassins aren't born, they're made,
Rich

Contact Rich at [email protected]

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Scott@TargetTestPrep: GMAT Instructor; Posts: 8086; Joined: Sat Apr 25, 2015 10:56 am; Location: Los Angeles, CA; Thanked: 43 times; Followed by:29 members

by Scott@TargetTestPrep » Thu May 24, 2018 12:29 pm

BTGmoderatorLU wrote:In a sample of associates at a law firm, 30 percent are second-year associates, and 60 percent are not first-year associates. What percentage of the associates at the law firm have been there for more than two years?

A. 10
B. 20
C. 30
D. 40
E. 50

Since 60% are not first year, they are 2nd year or longer. Since 30% are 2nd year, then 60% - 30% = 30% have been there for longer than 2 years.

Answer: C

Scott Woodbury-Stewart
Founder and CEO
[email protected]