What was the weight of the heaviest fish?

Question

the average weight of the top 5 fish caught at a fishing tour was 12.3 pounds. Some of the weights of the fish are shown on table 

12.8

12.6

11.8

9.7

Answer 1

First, find the missing weight w from

 

(w + 12.8 + 12.6 + 11.8 + 9.7)/5 = 12.3

 

Solve this equation for w.  Once you know w, you will have all 5 weights, and then select the highest weight.  It will be either 12.8 or w.