The average (arithmetic mean) of 8 numbers is Z, and one of the numbers is 14. If 14 is replaced with 28, then what is the new average (arithmetic mean) in terms of Z?
Choose the correct choice from the following
A) Z + 1/2  B) Z + 7/4  C) Z + 2  D) Z + 4  E) 2Z + 1
(8z−14+28)/8   Or, (8z+14)/8   Or, (4z+7)/4   Or, z+7/4   So, correct answer will be (Z + 7/4) z+7/4
<result>B</result>
The average (arithmetic mean) of 8 numbers is Z, and one of the numbers is 14. If 14 is replaced with 28, then what is the new average (arithmetic mean) in terms of Z?