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..4 b.. 5 c… 6 d…..7.
7 balls are green 20-7=13 So, we need to red balls, and the sum of the red and green balls are 13. We already know that the green balls are 7 So, 13-7=6
Out of the following choices given, if 7 balls are green and the sum of red balls and green balls is less than 13, at most there are 6 red balls. The answer is C.
