A Question is given followed by two Statements I and II. Consider the Question and the Statements.

Question:

What is the number of students in the class?

Statement-I:

Exclusion of the tallest and the shortest student from the class does not change the average height.

Statement-II:

The tallest student is 170 cm and the shortest student is 130 cm.

Which one of the following is correct in respect of the above Question and the Statements?