The number of gray marbles to black marbles in a bowl was in the ratio of 4:5. Later, 8 gray marbles were taken out and 20 black marbles were added into the bowl. After that, the ratio of gray marbles to black marbles became 4:11.
Product Description These 3 lb. lightweight, low bounce, high quality, long lasting balls are made of a tough rubberized plastic material and are available in six different colors or you can order a set of six (1 ea. color).”… More >>