Forum Home > GMAT > Quantitative > Problem Solving (PS)
Events & Promotions
|
|
GMAT Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Dec 1310:00 AM EST
-12:00 PM EST
Have you ever wondered how to score a PERFECT 805 on the GMAT? Meet Julia, a banking professional who used the Target Test Prep course to achieve this incredible feat. Julia's story is nothing short of an inspiration.
Dec 1410:00 AM EST
-12:00 PM EST
Think a 100% GMAT Verbal score is out of your reach? Target Test Prep will make you think again! Our course uses techniques such as topical study and spaced repetition to maximize knowledge retention and make studying simple and fun.
Dec 1411:00 AM IST
-01:00 PM IST
Attend this session to learn how to Deconstruct arguments, Pre-Think Author’s Assumptions, and apply Negation Test.- Dec 15
11:00 AM IST
-01:00 PM IST
Attend this free GMAT Algebra Webinar and learn how to master the most challenging Inequalities and Absolute Value problems with ease. 
Dec 1608:00 AM PST
-11:59 PM PST
GMAT Club 12 Days of Christmas is a 4th Annual GMAT Club Winter Competition based on solving questions. This is the Winter GMAT competition on GMAT Club with an amazing opportunity to win over $40,000 worth of prizes!- Dec 17
09:00 AM PST
-10:00 AM PST
Join Manhattan Prep instructor Whitney Garner for a fun—and thorough—review of logic-based (non-math) problems, with a particular emphasis on Data Sufficiency and Two-Parts. - Dec 18
10:00 AM PST
-11:00 AM PST
Here is the essential guide to securing scholarships as an MBA student! In this video, we explore the various types of scholarships available, including need-based and merit-based options.
26 Aug 2018, 21:24
Kudos
Bookmarks
E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
76% (01:56) correct
24%
(02:16)
wrong
based on 222
sessions
History
Date
Time
Result
Not Attempted Yet
Every week, Renee is paid $40 per hour for the first 40 hours she works, and $80 per hour for each hour she works after the first 40 hours. How many hours would Renee have to work in one week to earn an average (arithmetic mean) of $60 per hour that week?
(A) 60
(B) 65
(C) 70
(D) 75
(E) 80
(A) 60
(B) 65
(C) 70
(D) 75
(E) 80
26 Aug 2018, 21:39
Kudos
Bookmarks
Bunuel
Every week, Renee is paid $40 per hour for the first 40 hours she works, and $80 per hour for each hour she works after the first 40 hours. How many hours would Renee have to work in one week to earn an average (arithmetic mean) of $60 per hour that week?
(A) 60
(B) 65
(C) 70
(D) 75
(E) 80
(A) 60
(B) 65
(C) 70
(D) 75
(E) 80
Renee makes $40*40 hours=$1600 in first 40 hours
Let 't' be the no of hours Renee would work.
Given, Renee makes $80 per hour for each hour she works after the first 40 hours. So, she makes an additional pay $80*(t-40)hours for every hour after 40 hours.
So, \(\frac{1600+80(t-40)}{t}=60\)
Or, 1600+80t-3200=60t
Or, 20t=1600
or, t=80 hours
Ans. (E)
General Discussion
Sreyoshi007
Joined: 01 Feb 2018
Last visit: 18 Mar 2019
Posts: 84
Own Kudos:
Given Kudos: 769
Location: India
Schools: ISB '20 (WA) NUS '21 (I) NTU '20 (D)
GMAT 1: 700 Q47 V38
WE:Consulting (Consulting)
26 Aug 2018, 22:22
Kudos
Bookmarks
PKN
Bunuel
Every week, Renee is paid $40 per hour for the first 40 hours she works, and $80 per hour for each hour she works after the first 40 hours. How many hours would Renee have to work in one week to earn an average (arithmetic mean) of $60 per hour that week?
(A) 60
(B) 65
(C) 70
(D) 75
(E) 80
(A) 60
(B) 65
(C) 70
(D) 75
(E) 80
Renee makes $40*40 hours=$1600 in first 40 hours
Let 't' be the no of hours Renee would work.
Given, Renee makes $80 per hour for each hour she works after the first 40 hours. So, she makes an additional pay $80*(t-40)hours for every hour after 40 hours.
So, \(\frac{1600+80(t-40)}{t}=60\)
Or, 1600+80t-3200=60t
Or, 20t=1600
or, t=80 hours
Ans. (E)
Hi, Could you explain this part " So, she makes an additional pay $80*(t-40)hours for every hour after 40 hours.".
The way I was looking at it was:
Let x be the extra hours worked,
so to make the average equal to 60,
In the first 40 hours, amount earned = 1600.
Next x hours, amount earned = 80x (Since per hour = $80 after first 40 hrs)
(1600 +80x) / (40 + x) = 60
But on solving this I get 20x = 800 and x = 40 which is not in the options.
Could you please explain where am I going wrong?
Thanks a lot.
