Question

The average weight of class of 10 students is 70 kgs if a new student whose weight is 81 kgs joins the class what is weight of class after this

Answer 1

Answer:

Step-by-step explanation:

Average weight of 10 student =70 kg

That means total weight= 70*10=700

Later one student come whose weight is 81

Now total number student =11

Total weight of 11 student= 700+81=781

Average weight=781/11=71

Answer 2

Answer:

This is an average problem

Step-by-step explanation:

In mathematics, the central value of a set of data is expressed as the average of a list of data. It is defined mathematically as the ratio of the total number of data points to the number of units in the list. In terms of statistics, the term "mean" also refers to the average of a certain set of numerical data. The average of 2, 3, and 4 is, for instance, (2+3+4)/3 = 9/3 = 3. The centre value of 2, 3, and 4 in this instance is 3, thus. Finding the mean value of a group of numbers is the definition of average.

Sum of weights of 10 members= 70*10= 700 kg Sum of 10 members+11th member= 70+81= 781 kg Average weight of 11 members= 781/11= 71 Kg Hence (A) 71 Kg

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