hou many of the twenty people don't play a musical instrument?

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hou many of the twenty people don't play a musical instrument?
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hou many of the twenty people don't play a musical instrument?
hou many of the twenty people don't play a musical instrument?

hou many of the twenty people don't play a musical instrument?
二十人中有多少人不会乐器?

这20人中有多少人不玩乐器？