Tough and Tricky questions: Work/Rate Problems.
A group of 4 junior lawyers require 3 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
Select:
A) 13	B) 10	C) 9	D) 6	E) 5
# of people times the # of hours:   4*3= 
<gadget id="calculator">4*3</gadget>
<output>12</output>
12 --&gt; 3 lawyers do 12worksin 3 hours.   3*6/3= 
<gadget id="calculator">3*6/3</gadget>
<output>6</output>
6 --&gt; 3 assistants do 6 worksin 2 hours   So, since the amount of work the assistants do is half the work the lawyers do, the time will be double, soANS 6
<result>D</result>
Tough and Tricky questions: Work/Rate Problems.
A group of 4 junior lawyers require 3 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