C. If there are 20 marbles and 12 are yellow, then the number of non-yellow marbles is:20 - 12 = 8There are 8 non-yellow marbles.Hope it helped,Happy homework/ study/ exam!
12 yellow marbles of 20 marbles total leaves 20-12 = 8 non-yellow marbles.
5.9m questions
7.7m answers