In May, Mrs. Smith's earnings were 60% of the Smith family's : Quant Question Archive [LOCKED]
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 22 Jan 2017, 18:01

### 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

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# In May, Mrs. Smith's earnings were 60% of the Smith family's

Author Message
Senior Manager
Joined: 23 May 2005
Posts: 266
Location: Sing/ HK
Followers: 1

Kudos [?]: 43 [0], given: 0

In May, Mrs. Smith's earnings were 60% of the Smith family's [#permalink]

### Show Tags

20 Oct 2006, 00:59
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

In May, Mrs. Smith's earnings were 60% of the Smith family's total income. In June Mrs. Smith earned 20 percent more than in May. If the rest of the family's income was the same both monts, then, in June, Mrs. Smith's earnings were approximately what percent of the Smith family's total income?

64%
68%
72%
76%
80%

OA is 64%.

But i get 72%. I don't know where i went wrong in my computation (below).

F = family income each month
M = Mrs Smith's income for May
J = Mrs Smith's income for June

May: 0.60F = M
June: J = 1.2M

J = 1.2 (0.60F)
J = 0.72F

J/F = .72
VP
Joined: 15 Jun 2006
Posts: 1124
Schools: Chicago Booth
Followers: 5

Kudos [?]: 42 [0], given: 0

### Show Tags

20 Oct 2006, 03:21
In your calculation you fail to take into account that the income of the rest of the family stays the same, BUT the total family income increases. In your calculation it's vice versa.

The correct calculation should look like this:
(0.6*1.2)/(0.6*1.2+0.4)=0.72/1.12=0.64
Senior Manager
Joined: 23 May 2005
Posts: 266
Location: Sing/ HK
Followers: 1

Kudos [?]: 43 [0], given: 0

### Show Tags

20 Oct 2006, 22:07
Sheesh! That's tricky... I dunno how i'm going to get a 700 score on this freakin exam if i keep missing out on those details... So frustrating.

... Thanks...
VP
Joined: 15 Jun 2006
Posts: 1124
Schools: Chicago Booth
Followers: 5

Kudos [?]: 42 [0], given: 0

### Show Tags

21 Oct 2006, 01:23
Hermione wrote:
Sheesh! That's tricky... I dunno how i'm going to get a 700 score on this freakin exam if i keep missing out on those details... So frustrating.

... Thanks...

No worries! I'm sure you are going to do fine, just keep up the hard work
21 Oct 2006, 01:23
Display posts from previous: Sort by