SAT Math Multiple Choice Practice Question 303: Answer and Explanation
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Question: 303
17. 
If class B and class E each had 100 students in 2002 and 2003, then, in total, how many more students participated in the fund-raiser from class E than from class B over the 2 years?
A. 10
B. 20
C. 30
D. 40
E. 60
Correct Answer: E
Explanation:
E If both classes have 100 students, then class B had 30 students participate in 2002 and 50 in 2003, for a total of 80. Class E had 80 in 2002 and 60 in 2003, for a total of 140. The difference, then, is 
.