31. Mark carried 3¼ kg of millet, 4¾ kg of sorghum
and 15kg of maize to the market. He sold
2½kg of millet 2¾kg of sorghum and 10kg of
maize. What was the total mass cereals that
remained?
A. 15¼ kg
B. 23kg
C. 8¼kg
D. 7¾kg
what's the solution to solve it?