GRE Prep 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.
For a physical fitness test, scores are determined by the ex
[#permalink]
27 Jul 2018, 06:58
27 Jul 2018, 06:58
Expert Reply
00:00
Question Stats:
80% (01:53) correct
19% (03:32) wrong based on 31 sessions
Hide Show timer Statistics
For a physical fitness test, scores are determined by the expression \(2ps – 45m\), where \(p\) and \(s\) are the numbers of push-ups and sit-ups an athlete can do in one minute for each activity and m is the number of minutes the athlete takes to run a mile. During the test, Abraham did 21 push-ups and 30 sit-ups and ran the mile in 10 minutes. Javed got the same score, but did 4 more push-ups and ran the mile in 12 minutes. How many sit-ups did Javed do in one minute?
(A) 16
(B) 19
(C) 25
(D) 27
(E) 35
(A) 16
(B) 19
(C) 25
(D) 27
(E) 35
Re: For a physical fitness test, scores are determined by the ex
[#permalink]
12 Aug 2018, 04:52
12 Aug 2018, 04:52
Expert Reply
Explanation
First, calculate Abraham’s score: \(2ps - 45m, = 2(21)(30) - 45(10) = 1260 - 450 = 810\).
Javed got a score of 810 also, but did 4 more push-ups than Abraham, or \(21 + 4 = 25\) push-ups.
So, the formula for Javed’s score is:
\(810 = 2ps - 45m\)
\(810 = 2(25)s - 45(12)\)
\(810 = 50s - 540\)
\(1,350 = 50s\)
\(s = 27\)
First, calculate Abraham’s score: \(2ps - 45m, = 2(21)(30) - 45(10) = 1260 - 450 = 810\).
Javed got a score of 810 also, but did 4 more push-ups than Abraham, or \(21 + 4 = 25\) push-ups.
So, the formula for Javed’s score is:
\(810 = 2ps - 45m\)
\(810 = 2(25)s - 45(12)\)
\(810 = 50s - 540\)
\(1,350 = 50s\)
\(s = 27\)
gmatclubot
Re: For a physical fitness test, scores are determined by the ex [#permalink]
12 Aug 2018, 04:52
Moderators:
