The mean weight of a class of 20 students is 48 kg. Two more students weighing 60 kg and 58 kg respectively join the class. What is the mean weight of the class now?

Open in App

Solution

Mean Weight=48 out of 20 students

Therefore total weight = 20 × 48 = 960

Add two students weighing 60, 58 to 960 = 960+60+58 = 1078

Therefore, Mean = $\frac{1078}{22}$
= 49Kg

So new mean weight of class is 49 Kg

Suggest Corrections

137

Similar questions

The mean weight of 25 students of a class is 52 kg. If the mean weight of the first 13 students of the class is 48 kg and that of the last 13 students is 55 kg, find the weight of the 13th student.

Q. The average weight of 20 students in a class is 48 Kg. One more person joins the class and the average weight increases by 1 Kg. What is the weight of the new joiner?

Q. The average weight of the students of a class is

60 k g

. If eight new students of average weight

64 k g

join the class, the average weight of the entire class becomes

62 k g

. How many students were there in the class initially?

Q. The mean weight of

150

students in a certain class is

60

kg. The mean weight of boys in the class is

70

kg and that of girls if

55

kg, then number of boys and girls respectively are

Q. The mean weight of 150 students in a class is 60 kg. The mean of boys in the class is 70 kg and that of girls is 55 kg. Find the number of boys and girls in the class.

Join BYJU'S Learning Program

The mean weight of a class of 20 students is 48 kg. Two more students weighing 60 kg and 58 kg respectively join the class. What is the mean weight of the class now?

Mean Weight=48 out of 20 students Therefore total weight = 20 × 48 = 960 Add two students weighing 60, 58 to 960 = 960+60+58 = 1078 Therefore, Mean = 107822 = 49Kg So new mean weight of class is 49 Kg

Mean Weight=48 out of 20 students

Therefore total weight = 20 × 48 = 960

Add two students weighing 60, 58 to 960 = 960+60+58 = 1078

Therefore, Mean = $\frac{1078}{22}$
= 49Kg

So new mean weight of class is 49 Kg