Syntax problem?

I was trying to sole this problem a different way, here is the link to the lesson;
I tried to solve it in a different way from the solution where I mathematically averaged the 3 parameters by first finding the number of parameters and adding the sum of the 3 parameters and then dividing the sum by the number of parameters did i do it wrong?

Hello @the_gaint_02, welcome to the forums! It seems you did it correctly, but could you post your code, please? Be sure to format it correctly; see this thread on how to do it.