This is one way you could do it....
Set up a new variable for each of your questions - i.e. q1_Score, q2_score etc.
For EACH radio button in your question add the following action:
modify variable > q1_score > 1 (or 2,3 or 4) > set variable contents
repeat for EACH question.
For the results page:
Add a new variable - e.g. AveScore
Add a new text box where you want the new score displayed - e.g. txtAveScore
Add a new Action Group with the following actions:
modify variable > AveScore > var(q1_Score) > set variable contentsmodify variable > AveScore > var(q2_Score) > ADD to variablemodify variable > AveScore > var(q3_Score) > ADD to variable....repeat.....modify variable > AveScore > var(q10_Score) > ADD to variablemodify variable > AveScore > 10 > divide variable bychange contents > txtAveScore > AveScore
Add an On Show action to the page level to run the above action group.
NB: This assumes that there are 10 questions in your survey.