一个盒子装有2只红球里有同样大小的红球和篮球个6个,要想摸出的球一定有3个同色,至少要摸几个?

Apache Tomcat/7.0.59 - Error report HTTP Status 403 - type Status reportmessage description Access to the specified resource has been forbidden.Apache Tomcat/7.0.59

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