AMC 8 1987 Problem 16
AMC8 1987 年第 16 题
百分比★★★☆☆
Joyce made 12 of her first 30 shots in the first three games of this basketball season, so her seasonal shooting average was 40% . In her next game, she took 10 shots and raised her seasonal shooting average to 50% . How many of these 10 shots did she make?
Joyce 在本篮球赛季的前三场比赛中前 30 次出手命中 12 次，因此她的赛季命中率为 40%。在下一场比赛中，她出手 10 次并将赛季命中率提高到 50%。这 10 次出手她命中了多少次？
- A.2
- B.3
- C.5
- D.6
- E.8
正确答案 · Correct Answer
E
解析 · Solution
Solution 1
After the fourth game, Joyce had taken 40 total shots, 50% of which she made, so she made shots. Since she made 12 shots in the first three games, she made 20-12=8 shots in the last game.
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