AMC8 1996

AMC8 1996 · Q13

AMC8 1996 · Q13. It mainly tests Interest / growth (simple).

In the fall of 1996, a total of 800 students participated in an annual school clean-up day. The organizers of the event expect that in each of the years 1997, 1998, and 1999, participation will increase by 50% over the previous year. The number of participants the organizers expect in the fall of 1999 is

1996 年秋季共有 800 名学生参加年度学校清洁日。组织者预计 1997、1998 和 1999 年每年的参与人数将比前一年增加 50%。组织者预计 1999 年秋季的参与人数为

(A) 1200 1200

(B) 1500 1500

(D) 2400 2400

(E) 2700 2700

Answer

Correct choice: (E)

正确答案：（E）

Solution

Answer (E): Since 50% of 800 is 400, the organizers expect $800 + 400 = 1200$ participants in 1997. Since 50% of 1200 is 600, $1200 + 600 = 1800$ are expected in 1998. Since 50% of 1800 is 900, $1800 + 900 = 2700$ are expected in 1999.

答案（E）：由于800的50%是400，组织者预计1997年有$800 + 400 = 1200$名参与者。由于1200的50%是600，预计1998年有$1200 + 600 = 1800$名。由于1800的50%是900，预计1999年有$1800 + 900 = 2700$名。

Topics

AR.010 Interest / growth (simple)