Question 252239
the median is 5 means that (b + c) / 2 = 5


this means that (b + c) = 10 assuming you multiply both sides of that equation by 2.


the mean is 8 means that (a + b + c + d)/4 = 8


substituting for (b + c) = 10, we get:


(a + 10 + d) / 4 = 8


multiply both sides of this equation by 4 to get:


a + d + 10 = 32


subtract 10 from both sides of this equation to get:


a + d = 22


your answer would be selection c (22).