hiennguyen14020202 hiennguyen14020202
  • 24-06-2021
  • Mathematics
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Gọi A là biến cố học giỏi mon toán, B là biến cố học giỏi môn văn. Biến cố của biến cố A+B có nghĩa là

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smixon1095
smixon1095 smixon1095
  • 24-06-2021
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