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  3. At the eating contest the winner ate an average of 15 hot dogs at the first 20 sittings. After a further 20 sittings the average

At the eating contest the winner ate an average of 15 hot dogs at the first 20 sittings. After a further 20 sittings the average

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问题 At the eating contest the winner ate an average of 15 hot dogs at the first 20 sittings. After a further 20 sittings the average increased to 20 hot dogs. What was the average for the last 20 sittings?
选项 A、15.
B、20
C、25
D、3
答案C
解析
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本试题收录于： C类竞赛（非英语专业本科）题库大学生英语竞赛（NECCS）分类
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C类竞赛（非英语专业本科）

大学生英语竞赛（NECCS）

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