The mean weight fof 10 students is 42. There is no change in the average when two students are added. If one of the newly added students weight is 40 , what is the weight of the second?

Out of 100 students,two sections of 40 and 60 are formed.If you and your friend are among the 100 students,what is the probability that You both enter the same section?

Out of 100 students,two sections of 40 and 60 are formed.If you and your friend are among the 100 students,what is the probability that : You both enter the different section?

There are 42 students in standard 6 A. The average weight of students is 35 kilograms. If two students with weight 33kg and 37 kg are transferred to another school, find the average weight of the remaining students in6A

Three groups of 10 kids. The average weight of a kid in each group is 35 kilograms. One more kid joined each group. i) The average weight of a kid in the first group is still 35 kilograms. ii) The average weight of a kid in the second group is now 36 kilograms. iii) The average weight of a kid in the third group is now 34 kilograms. Compute the weight of the new kid in each group.

A pumpkin is cut into three equal pieces. Two pieces together weigh one kilogram. What is the weight of the whole pumpkin?

In a class there are 20 boys and the remaining students are girls.The mean weights of the total 50 students is 23 kg. The mean weight of boys is 30.Then find out the mean weight of girls.

The following values are calculated in respect of heights and weights of the students of a section of Class XI: