Average problem

Average of (20,60,100) = 180/3 = 60

Given 60 is 10 more than average of (40,80,x)

(or) Avg of (40,80,x) = 50

120+x = 3(50)

[spoiler]x = 30 (E)[/spoiler]

Quote

massi2884: Senior | Next Rank: 100 Posts; Posts: 95; Joined: Tue Sep 13, 2011 3:19 pm; Thanked: 3 times; GMAT Score:710

by massi2884 » Thu May 31, 2012 9:10 am

Avg. of 20, 60, and 100 is (100+20+60)/3 = 60

60 is 10 more than 50

If 50 is the avg. of 3 numbers, their sum is 3x50 = 150

What is missing to 40 + 80 to get to 150 is 30 (E)

Quote

Post new topic Post Reply

• Page 1 of 1

5/5

5 Star (473 Reviews)

"Target Test Prep is the closest to the official version of the GMAT exam, about 99% accuracy in terms of the quality and quantity of information. The course has excellently created singular sets of focused lessons and tests for every possible topic that one could come across in the official GMAT exam."

"The TTP course maximizes the efficiency of the time you spend studying. It will take time and effort but I could almost guarantee that if you complete the course exactly as it is laid out you will get an amazing score. They also have a very responsive team willing to help with any questions you might have."

"TTP has two things that I think no other test prep company offers: A teaching approach that reinforces understanding and an attitude that will give you the mental preparedness needed to succeed on the test. TTP gives you a deep understanding of the concept you need to know while teaching you how to think."

Write a Review