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1. In a week, temperature of a certain place is measured during winter are as follows \(26^{\circ} C\), \(24^{\circ} C\), \(28^{\circ} C\), \(31^{\circ} C\), \(30^{\circ} C\), \(26^{\circ} C\), \(24^{\circ} C\). Find the mean temperature of the week.
 
Answer:
 
The mean temperature \(=\) i°C
 
2. The mean weight of \(4\) members of a family is \(60kg\). Three of them have the weight \(56kg\), \(68kg\) and \(72kg\), respectively. Find the weight of the fourth member.
 
Answer:
 
The weight of the fourth member \(=\) \(kg\)