The average weight of the students of a class is `60kg`. If eight new students of average weight `64 kg` join the class, the average weight of the entire class becomes `62 kg`. How many students were there in the class initially.

The average weight of the students of a class is 60kg. If eight new students of average weight 64kg join the class,the average weight of the entire class becomes 62kg. How many students were there in the class initially.

The average weight of students in a class was 60.5 kg. When & students, whose average weight was 65 kg, joined the class, then the average weight of all the students increased by 0.9 kg. The total number of students now in the class is:

The mean weigth of 30 students of a class is 60.2kg . Two students of weights of 50 kg and 67 kg left the class . Find the mean weight of the remaining students

The average height of the students in a class of 10 is 105 cm .If 20 more students with an average height of 120 cm join the class , what will the new average height be ?

The average weight of 29 students in a class is 48 kg. If the weight of the teacher is included, the average weight rises by 500 g. Find the weight of the teacher

The average weight of a class of 15 boys and 10 girls is 38.4 kg . If the average weight of the boys is 40 kg, then what is the average weight of the girls ?