In Java Programming 8th edition chapter 9 #2-part b(MeanMedian2). How do I fix the following?

L50: median=(list[m]+list[m-1])/2;

I also had median=(double)(list[m]+list[m-1])/2;

My professor still says..

I still don't see any type conversion here. If you don't like a type conversion. You can use this way: change a constant 2 to a double 2.0. So, 2 ==> 2.0 (This is a convenient way to avoid an integer division).

I have never done a programming class and I still dont understand what to fix. Please help!