If the average (arithmetic mean) of a and b is 35 and the average of b and c is 80, what is the value of c − a?
Answers.
A) 25 B) 50 C) 90 D) 140 E) It cannot be determined from the information given.
-(a + b = 70)   b + c=160   c-a=90   C. 90
<result>C</result>
If the average (arithmetic mean) of a and b is 35 and the average of b and c is 80, what is the value of c − a?