I would appreciate if you do a step by step work pls !!

The average of 5 distinct scores has the same value as the median of the 5 scores. the sum of the 5 scores is 420. what is the sum of the 4 scores that are not the median? * explain how you found the answer * a) 315 b) 320 c) 336 d) 350 e) 360

Taking algebra two apex courses and need with these questions

Factor the expression using gcf 9b+45