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