Answer: choice A) 3 & 1/4 quarts
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Work Shown:
There are 2 x's over the "1/4", so 2*1/4 = 2/4 of a quart is drank in total by this group. Let P = 2/4
There are 5 x's over the "3/4", so 5*3/4 = 15/4 quarts is drank in total by this group. Let Q = 15/4
Subtract P and Q
Q - P = 15/4 - 2/4 = (15-2)/4 = 13/4
Convert the result to a mixed number
13/4 = (12+1)/4
13/4 = 12/4 + 1/4
13/4 = 3 + 1/4
13/4 = 3 & 1/4