In Viet Nam, there are many natural disaster such as tornado, flood, drought,storm,... One of the most natural disasters often happens in Viet Nam is storm.First, the storm always happens regularly. After the storm happens, the road, rivers will very dirty and people will clean up the street because when a storm comes, it will bring strong winds and heavy rain, so there will be a lot of trash.It is crucial for everyone to stay informed and follow safety instructions during the storm season.

In Viet Nam, there are many natural disaster such as tornado, flood, drought,storm,... One of the most natural disasters often happens in Viet Nam is storm.First, the storm always happens regularly. After the storm happens, the road, rivers will very dirty and people will clean up the street because when a storm comes, it will bring strong winds and heavy rain, so there will be a lot of trash.It is crucial for everyone to stay informed and follow safety instructions during the storm season.

In Viet Nam, there are many natural disaster such as tornado, flood, drought,storm,... One of the most natural disasters often happens in Viet Nam is storm.First, the storm always happens regularly. After the storm happens, the road, rivers will very dirty and people will clean up the street because when a storm comes, it will bring strong winds and heavy rain, so there will be a lot of trash.It is crucial for everyone to stay informed and follow safety instructions during the storm season.

+Các kết quả thuận lợi cho biến cố " Chiếc kim chỉ vào hình quạt ghi số chia hết cho 3 " là : 3 và 6.

=>Xác suất của biến cố " Chiếc kim chỉ vào hình quạt ghi số chia hết cho 3 " là : 2/6 = 1/3.

Tần số ghép nhóm của nhóm [60;70) là : 10.

Tần số tương đối ghép nhóm của nhóm [60;70) là : 25%