Question: Heights of 6 Children

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Comment on Heights of 6 Children

I was trying to use to

venugopalpudipeddi - May 11, 2017

I was trying to use to deviation here to solve this question but I could not get the correct answer. I started with the age of Ren as 46.5. Because there are two with 42, the deviation was -9 units below and there three with 50, the deviation was +10.5. To balance this I added the +1.5 to 46.5 and concluded that 48 is Ren age. Can you please tell me what I am missing here?

We're not told anything about

gmat-admin - May 12, 2017

We're not told anything about the standard deviation of the ages.

Can't we just solve this by

Yamini Sharma - August 7, 2017

Can't we just solve this by finding the sum of the ages of the 2 shortest children and the sum of the ages of the 3 tallest children and then subtracting that from the sum of the ages of the 6 children?

The video features two

gmat-admin - August 7, 2017

The video features two possible solutions. The solution you suggest is covered in the first half of the video.

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