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

Question :

If the average marks in a class are 60, then what is the number of students in the class?

Statement-I :

The highest marks in the class are 70 and the lowest marks are 50.

Statement-II :

Exclusion of highest and lowest marks from the class does not change the average.

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

The Question can be answered by using one of the Statements alone, but cannot be answered using the other Statement alone

The Question can be answered by using either Statement alone

The Question can be answered by using both the Statements together, but cannot be answered using either Statement alone

The Question cannot be answered even by using both the Statements together