If the average (arithmetic mean) of (2a+16) and (3a-8) is 69, what is the value of a?
Choose the correct choice: A) 26 B) 30 C) 28 D) 36 E) 42

Rationale: ( ( 2 a + 16 ) + ( 3 a - 8 ) ) / 2 = ( 5 a + 8 ) / 2 = 69 a = 26 the answer is a .
Answer: A