If the Average (mean ) of 7 positive temperatures is x degrees fahrenheit, then the sum of the 3 greatest of these temperatures, in degrees Fahrenheit, could be	Options
A) 6x	B) 4x	C) 5x/3	D) 3x/2	E) 3x/5
Let the 5 numbers be 1,2,3,4,5,6,7 (since no restrictions are given). There mean is 4 (x).   Now the sum of greatest three would be 5+6+7= 
<gadget id="calculator">5+6+7</gadget>
<output>18</output>
18   so the answer has to be 6x....that is option 6x
<result>A</result>
If the Average (mean ) of 7 positive temperatures is x degrees fahrenheit, then the sum of the 3 greatest of these temperatures, in degrees Fahrenheit, could be