摘要:A.60° B.50° C.40° D.30°
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某班50名学生右眼视力的检查结果如下表所示:
| 视力 | 0.1 | 0.2 | 0.3 | 0.4 | 0.5 | 0.6 | 0.7 | 0.8 | 1.0 | 1.2 | 1.5 |
| 人数 | 1 | 1 | 3 | 4 | 3 | 4 | 4 | 6 | 8 | 10 | 6 |
某班50名学生右眼视力的检查结果如下表所示:
| 视力 | 0.1 | 0.2 | 0.3 | 0.4 | 0.5 | 0.6 | 0.7 | 0.8 | 1.0 | 1.2 | 1.5 |
| 人数 | 1 | 1 | 3 | 4 | 3 | 4 | 4 | 6 | 8 | 10 | 6 |