It is currently 14 Nov 2018, 11:24

### 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

# A student's score on the final test in a certain course was

Author Message
TAGS:
Moderator
Joined: 18 Apr 2015
Posts: 4871
Followers: 74

Kudos [?]: 969 [0], given: 4474

A student's score on the final test in a certain course was [#permalink]  19 Jun 2018, 09:24
Expert's post
00:00

Question Stats:

50% (00:44) correct 50% (03:04) wrong based on 10 sessions
A student's score on the final test in a certain course was 60% greater than the average (arithmetic mean) score of the 2 other tests the student took in the course. The student's score on the final test was what percent of the student's average test score for the entire course?

A. $$33 \frac{1}{3} %$$

B. $$40%$$

C. $$75%$$

D. $$133 \frac{1}{3}%$$

E. $$160%$$
[Reveal] Spoiler: OA

_________________
Intern
Joined: 08 Apr 2018
Posts: 44
Followers: 0

Kudos [?]: 14 [0], given: 16

Re: A student's score on the final test in a certain course was [#permalink]  19 Jun 2018, 22:14
Carcass wrote:
A student's score on the final test in a certain course was 60% greater than the average (arithmetic mean) score of the 2 other tests the student took in the course. The student's score on the final test was what percent of the student's average test score for the entire course?

A. $$33 \frac{1}{3} %$$

B. $$40%$$

C. $$75%$$

D. $$133 \frac{1}{3}%$$

E. $$160%$$

Director
Joined: 07 Jan 2018
Posts: 534
Followers: 4

Kudos [?]: 460 [2] , given: 82

Re: A student's score on the final test in a certain course was [#permalink]  21 Jun 2018, 22:11
2
KUDOS
We can assume two values for score in the first and second test.
To make calculation simple Let us say the student's score in the first test was 50 and in the second test was also 50.
The average of the two test would be 50.
The question mentions that the student's score on the final test was 60% more than the average of the two tests.
Hence the final test score of the student was 50 * 1.6 = 80

Now we need to find the average of the three tests because we have to compare this with the final test score.
Avg of the three tests = $$\frac{50 + 50 + 80}{3}$$ = $$\frac{180}{3}$$ = 60
We have all the information needed to answer the question.
Therefore final score/avg of three scores * 100 = the final score as a % of avg of the three scores.
$$\frac{80}{60}$$ * $$100$$ = $$133.33%$$
_________________

This is my response to the question and may be incorrect. Feel free to rectify any mistakes

Re: A student's score on the final test in a certain course was   [#permalink] 21 Jun 2018, 22:11
Display posts from previous: Sort by