题目内容（请给出正确答案）

[主观题]

The following are the durations in minutes of a sample of long-distance phone calls made w

ithin the continental United States reported by one long-distance carrier. Time (in minutes) Relative Frequency 0 but less than 5 0.37 5 but less than 10 0.22 10 but less than 15 0.15 15 but less than 20 0.10 20 but less than 25 0.07 25 but less than 30 0.07 30 or more 0.02 If 1,000 calls were randomly sampled, how many calls laasted under 10 minutes？

A、220

B、370

C、410

D、590

提问人：网友xsyztz 发布时间：2022-01-07

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