the highest batting average is of Ed's and that is 0.350 .
Explanation:
Here we have , Make, Dan, Ed, and summer played together on a baseball team. Mike’s batting average was 0.349, dan’s was 0.2, Ed’s was 0.35, and sy’swas 0.299. We need to find Who had the highest batting average . Let's find out :
According to question we have following parameters as :

Arranging these data from decreasing to increasing order we get :
⇒

⇒

Therefore , the highest batting average is of Ed's and that is 0.350 .