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.

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:

Want to score 90 percentile or higher on GMAT CR? Attend this free webinar to learn how to pre-think assumptions and solve the most challenging questions in less than 2 minutes.

Want to solve 700+ level Algebra questions within 2 minutes? Attend this free webinar to learn how to master the most challenging Inequalities and Absolute Values questions in GMAT

Re: Over a six-game stretch of her basketball season, Sonya scored 50, 47,
[#permalink]

Show Tags

10 Mar 2017, 23:26

we can calculate x without much of calculation through standard deviation as we know -ve deviation =+deviation(taken form mean). so when we take deviation form 47(taking x=47) then -7(+)-4=8+3 that will equal to zero so the value for X will be 47

Re: Over a six-game stretch of her basketball season, Sonya scored 50, 47,
[#permalink]

Show Tags

03 Dec 2019, 15:45

Top Contributor

Bunuel wrote:

Over a six-game stretch of her basketball season, Sonya scored 50, 47, 40, 43, 55, and x points. If her average score was x, what is the value of x?

A. 45 B. 46 C. 47 D. 48 E. 49

Sonya scored 50, 47, 40, 43, 55, and x points. Her average score was x We can write: (50 + 47 + 40 + 43 + 55 + x)/6 = x Multiply both sides by 6 to get: 50 + 47 + 40 + 43 + 55 + x = 6x Simplify to get: 235 + x = 6x Subtract x from both sides: 235 = 5x Solve: x = 235/5 = 47