Source: Official Guide Revised GRE 1st Ed. Part 6; Set 1; #13


A list of numbers has a mean

A list of numbers has a mean of 8 and a standard deviation of 2.5. If x is a number in the list that is 2 standard deviations above the mean, what is the value of x?

2 Explanations


Ravi Prakash

Use logic to find number using mean+SD+SD = 2nd number above mean

Nov 19, 2017 • Comment


Gravatar Chris Lele, Magoosh Tutor

Oct 7, 2012 • Comment

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