MBA Chat with Michelle Miller, MBA Admission Expert

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 Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 500,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

100% (03:09) correct
0% (00:00) wrong based on 2 sessions

HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Q. In a class 25% of the students were absent for an exam. 30% failed by 20 marks and 10% just passed because of grace marks of 5. Find the average score of the class if the remaining students scored an average of 60 marks and the pass marks are 33.

1. 37.266 2. 37.6 3. 37.8 4. 36.93 5. 37.5

Pretty easy question but answer given is 37.6 ( considering 75% students when calculating average...i understand 25% are absent...but when average of class is asked shouldnt 100% be included--- pls solve this confusion?)

Hi buddy, asuming that question is ok, how did you get to your 27.7? I have a totally different nbr

Assuming it is a class of 200 students. 50 were absent, and 150 were at the exam. 30% failed by 20 marks => means 45 students scored 13 10% just passed with a 5mark grant => means 15 students scored 28 the rest scored 60 => 90 students

Hi buddy, asuming that question is ok, how did you get to your 27.7? I have a totally different nbr

Assuming it is a class of 200 students. 50 were absent, and 150 were at the exam. 30% failed by 20 marks => means 45 students scored 13 10% just passed with a 5mark grant => means 15 students scored 28 the rest scored 60 => 90 students

avg = {(45x13)+(15x28)+(90x60)}/200 = 32.025

am I doing something wrong here?

Thx for your feedback

Actually it is a poorly worded question. I took 30% of overall students, you have taken 30% of passed students and so on...that is why we are getting different answers. Logically yes, absent students are to be discounted but the question does not specify anything. It is also possible that 30% of overall failed

30 students got 13 marks each and failed by 20 marks - their total marks = 390

10 got 28 marks each and just passed by 5 grace - their total marks = 280 (excluding grace marks)

remaining 35 got 60 on average - their total marks = 2100

total marks secured by all 75 who appeared in test = 390+280+2100 = 2770

avg marks = 2770/75 = 36.93

-->note that if grace marks are included for 10 just passed students then

their total = 330

final total = 2820

avg marks = 2820/75 = 37.6

Please correct if I'm wrong.

So it means grace marks have to be included

I comletely agree with this solution. No one says that absent students fail the course and should be given 0. But it is a tricky one. Kudo for you. If you do not include 25% that were abscent you get the following: 40%X13+13.33%X28+46.66%X60=36.93

However, answer is D. They say "remaining"...so overlap is not possible

30 students got 13 marks each and failed by 20 marks - their total marks = 390

10 got 28 marks each and just passed by 5 grace - their total marks = 280 (excluding grace marks)

remaining 35 got 60 on average - their total marks = 2100

total marks secured by all 75 who appeared in test = 390+280+2100 = 2770

avg marks = 2770/75 = 36.93

-->note that if grace marks are included for 10 just passed students then

their total = 330

final total = 2820

avg marks = 2820/75 = 37.6

Please correct if I'm wrong.

So it means grace marks have to be included

Why did you assume that all 10 students got 28? If the grace mark is 5, I understand that they could get min 28 marks. Is it possible the student got 30 marks and passed due to grace mark is 5? Correct me if i'm wrong

Hi buddy, asuming that question is ok, how did you get to your 27.7? I have a totally different nbr

Assuming it is a class of 200 students. 50 were absent, and 150 were at the exam. 30% failed by 20 marks => means 45 students scored 13 10% just passed with a 5mark grant => means 15 students scored 28 the rest scored 60 => 90 students

avg = {(45x13)+(15x28)+(90x60)}/200 = 32.025

am I doing something wrong here?

Thx for your feedback

I guess you need to include the grace marks also(anyway this marks also comes into the account). Assuming total 200 students 30% = 45*13 = 585 10% = 15*33 = 495 60% = 90*60 = 5400 =32.2

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________