There are 20 balls which are red, blue or green. If 7 balls are green and the su May 24, 2022 by admin โช Choose the correct option.There are 20 balls which are red, blue or green. If 7 balls are green and the sum of red balls and green balls is less than 13, at most how many red balls are there?A. 4B. 5C. 6D. 7 Submit Answer