If the average (arithmetic mean) of 5 positive temperatures is m degrees Fahrenheit, then the sum of the 3 greatest of these temperatures, in degrees Fahrenheit, could be:
Options.
A) 6m	B) 4m	C) 5m/3	D) 3m/2	E) 3m/5
The sum of three greatest should be more than sum of two lowest.   The total sum is; 5m   A. 6m; 6m is more than 5m. Not possible.   B. 4m; 5m-4m=m(Possible)   C. 5m/3; 10m/3; 10m/3 &gt; 5m/3. Not possible   D. 3m/2; 7m/2; 7m/2 &gt; 3m/2. Not possible   E. 3m/5; 22m/5; 22m/5 &gt; 3m/5. Not possible.   Ans:4m
<result>B</result>
If the average (arithmetic mean) of 5 positive temperatures is m degrees Fahrenheit, then the sum of the 3 greatest of these temperatures, in degrees Fahrenheit, could be: