Answer:
D. 17 11/20 tubs
Explanation:
Convert the cones into scoops.
234 regular cones = 468 scoops; 156 large cones = 468
So in total, Richard scooped 936 scoops. Since each scoop is 3 oz:
936 scoops * 3 oz = 2808 oz
Because a tub is 10 pounds or 160 oz:
2808 / 160 = 17.55 tubs