Tough and Tricky questions: Work/Rate Problems.
A group of 4 junior lawyers require 2 hours to complete a legal research assignment. How many hours would it take a group of three legal assistants to complete the same research assignment assuming that a legal assistant works at two-thirds the rate of a junior lawyer?
Source: Chili Hot GMAT  Choose the correct choice from the following answers:
A) 13 B) 10 C) 9 D) 6 E) 4
# of people times the # of hours:   4*2= 
<gadget id="calculator">4*2</gadget>
<output>8</output>
8 --&gt; 4 lawyers do 8worksin 2 hours.   3*4/3= 
<gadget id="calculator">3*4/3</gadget>
<output>4</output>
4--&gt; 3 assistants do 4worksin 4/3 hours   So, since the amount of work the assistants do is half the work the lawyers do, the time will be double, soANS 4
<result>E</result>
Tough and Tricky questions: Work/Rate Problems.
A group of 4 junior lawyers require 2 hours to complete a legal research assignment. How many hours would it take a group of three legal assistants to complete the same research assignment assuming that a legal assistant works at two-thirds the rate of a junior lawyer?
Source: Chili Hot GMAT