GAUSS7 2010 Problem 12

Past Contests GAUSS7 GAUSS (GR. 7) - 2010
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1

Recycling 1 tonne of paper will save 24 trees. If 4 schools each recycle \frac34 of a tonne of paper, then the total number of trees this will save is

Answer Choices
A. 24
B. 72
C. 18
D. 126
E. 80