In the following question, out of the four alternatives, choose the word which best expresses the meaning of the given word and click the button corresponding to it.
In a class, average height of all students is 'a' cms. Among them, average height of 10 students is 'b' cms and the average height of the remaining students is 'c' cms. Find the number of students in the class. (Here a>c and b>c )