While preparing the English results for a class, the marks of one student were incorrectly recorded as 95 instead of 57. As a result, the average score of the class increased by 0.95. How many students were there in the class?

What is the average number of students in B.Tech (220), M.Tech (140), and B.A (4344) courses together?

A class has two sections A and B, which have 36 and 44 students respectively. If the average weight of section A is 40 kg and that of section B is 35 kg, find the average weight of the whole class.