Answer:
18 mugs
Step-by-step explanation:
first let's convert 6 3/4 into eights. 6 3/4 as an improper fraction is 27/4, which we multiply by 2 to get 54/8. now we do 54 divided by 3, since we can now ignore the denominator. 54 divided by 3 = 18. This is divided evenly so the "including mugs that are partially filled" is a red herring.