The mean height of a group of 30 students is 150 cm. If a 150 cm tall student is included in the...

The mean weight of 9 students is 25 kg . If one more student is joined in the group the mean is unaltered , then the weight of the 10th student is "_________" (in kg ) .

The average of height of 16 students is 142 cm. If the height of the teacher is included, the average height increases by 1 cm. The height of the teacher is

The average height of 8 students is 152 cm. Two more students of heights 144 cm and 155 cm join the group. What is the new average height?

The mean weight of 20 students is 25 kg and the mean weight of another 10 students in 40 kg . Find the mean weight of the 30 students .

The mean weight of 21 students is 21 kg. If a student weighing 21 kg is removed from the group, then what is the mean weight of the remaining students ?

The mean weight of 21 students is 21 kg. If a student weighing 21 kg is removed from the group, then I what is the mean weight of the remaining students ?

There are 20 students in a class of them, the height of ten students is 150 cm each, the height of 6 students is 142 cm each and the height of 4 students is 132 cm each. Find the average height of all the students.

The mean height of 25 boys in a class is 150 cm , and the mean height of 35 girls in the same class is 145 cm . The combined mean height of 60 students in the class is "_______" (approximately).