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 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 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 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.
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
95%
(hard)
Question Stats:
40% (02:38) correct
60%
(02:45)
wrong
based on 208
sessions
History
Date
Time
Result
Not Attempted Yet
The temperature was measured once daily for 400 days. On 76% of these days, the temperature was less than or equal to 141.3 degrees. Was the median temperature lower than 100 degrees?
1) 60% of the days on which the temperature was greater than or equal to 100 degrees had a temperature higher than 141.3 degrees
2) 40% of the days on which the temperature was greater than or equal to 100 degrees had a temperature less than or equal to 141.3 degrees
1) 60% of the days on which the temperature was greater than or equal to 100 degrees had a temperature higher than 141.3 degrees
2) 40% of the days on which the temperature was greater than or equal to 100 degrees had a temperature less than or equal to 141.3 degrees
22 Jun 2019, 10:39
Kudos
Bookmarks
let readings (> 141.3) be \(x\) , and readings (≥ 100) be \(y\)
Given: \(x = \frac{24}{100}*400 = 96\)
statement 1: \(\frac{3}{5}*y = x = 96\)
so \(y = 96*\frac{5}{3} = 160\) which is < 50% of the readings, so the median must be < 100 --> sufficient
statement 2: \(\frac{2}{5}*y\) are less than 141.3, which mean that 3/5*y are more than 141.3 (same as statement 1) ---> sufficient
so D
Given: \(x = \frac{24}{100}*400 = 96\)
statement 1: \(\frac{3}{5}*y = x = 96\)
so \(y = 96*\frac{5}{3} = 160\) which is < 50% of the readings, so the median must be < 100 --> sufficient
statement 2: \(\frac{2}{5}*y\) are less than 141.3, which mean that 3/5*y are more than 141.3 (same as statement 1) ---> sufficient
so D
General Discussion
26 Jun 2019, 06:26
Kudos
Bookmarks
assigning the population to be P, the part greater than 141.3 to be x, the part greater than 100 to be y, we can rewrite the question as follows
x/P=0.24, y/P=0.5?
(1) x/y=0.6 ->y/P=0.24/0.6=0.4 --sufficient
(2) (y-x)/y=0.4 -> x/y=0.6 -> sufficient
Posted from my mobile device
x/P=0.24, y/P=0.5?
(1) x/y=0.6 ->y/P=0.24/0.6=0.4 --sufficient
(2) (y-x)/y=0.4 -> x/y=0.6 -> sufficient
Posted from my mobile device
