SOLUTION: what number must be added to 28 and 36 to give an average of 29 ? a) 23 b) 32 c)21 d)4 e) 5

Algebra ->  Average -> SOLUTION: what number must be added to 28 and 36 to give an average of 29 ? a) 23 b) 32 c)21 d)4 e) 5      Log On


   

Question 209235: what number must be added to 28 and 36 to give an average of 29 ?
a) 23 b) 32 c)21 d)4 e) 5
Answer by nyc_function(2741) About Me  (Show Source):
You can put this solution on YOUR website!
Let n = number we are looking for.
29 = (n + 28 + 36)/3
29 = (n + 64)/3
87 = n + 64
87 - 64 = n
23 = n
CHOICE A