The difference between the upper and lower class-limits of a class-interval is called :

1. width of the class-interval

2. frequency

3. class-limit

4. class-mark

In a bar-graph, if the widths of all the bars are kept same, their heights are proportional to their :

1. class-size

2. class-mark

3. class-limits

4. frequency

Consider the following class intervals of a grouped data :

Statement 1: Class marks of the 3^rd class intervals is 46.5.

Statement 2: If the class mark of 2^nd interval is 77.5, the interval is 60 - 85.

Which of the following options is correct?

1. Both the statements are true.

2. Both the statements are false.

3. Statement 1 is true, and statement 2 is false.

4. Statement 1 is false, and statement 2 is true.

Assertion (A) : If in a pie chart representing the number of students of opting for different streams in college admission out of a total admissions of 3300, the central angle for the sector representing mathematics is 48°, then the number of students who opt for mathematics is 440.

Reason (R) : Central angle for sector (Component) = $\Big(\dfrac{\text{Value of the component}}{\text{Total value}} \times 360°\Big)$

1. Both A and R are correct, and R is the correct explanation for A.

2. Both A and R are correct, and R is not the correct explanation for A.

3. A is true, but R is false.

4. A is false, but R is true.