BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

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Target Test Prep · GMAT

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Chris Peckover
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Oct 13 to Jan 7, 2027

with Chris Peckover

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Tue, Thu · 8:00 to 10:00 PM ET
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Logan Thompson
EXECUTIVE ASSESSMENT

Sep 6 to Dec 6, 2026

with Logan Thompson

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Sun · 9:30 AM to 12:30 PM ET
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40 hours of live online classes plus six months of access to the complete TTP EA OnDemand course.
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  • 4,100+ Quant, Verbal, and Integrated Reasoning practice questions
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Target Test Prep GMAT OnDemand

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Expert replies
Source: — Problem Solving |

by madhavi » Mon Mar 31, 2008 12:03 pm
If mean is 20, the values 2.5 standard deviations away from mean will be

20 + 2.5(3) and 20 - 2.5 (3)

27.5 and 12.5.

So, anything greater than 27.5 and less than 12.5 is more than 2.5 SDs away from mean.

Hence A, 12.0

https://goal-mba.blocked
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