Posted by Milen on Tuesday, November 6, 2012 at 4:53am.
The mean height of Pat, Dex, Allan, Dan and Roy is 68 inches. If George is included in the group, the mean height becomes 67 inches. How tall is George?

Math Statistics  Tarefa, Tuesday, November 6, 2012 at 6:00am
Show that 2Radical2an irrational number

Math Statistics  Reiny, Tuesday, November 6, 2012 at 8:10am
Your last 4 or 5 questions have all been the same type.
I will do this one and let you do the others in the same way
The average for the 5 boys is 68, so their total heights is 5(68) = 340
Let George's height be x
(x + 340)/6 = 67
x+340 = 402
x = 62
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