Inclusive Method and Exclusive Method

Q.

A grouped frequency table with class intervals of equal sizes using $250-270$ ($270$ not included in this interval) as one of the class interval is constructed for the following data :$268,220,368,258,242,310,272,342,310,290,300,320,319,304,402,318,406,292,354,278,210,240,330,316,406,215,258,236$. The frequency of the class$310-330$ is:

1. $4$

2. $5$

3. $6$

4. $7$

Q.

The width of each of five continuous classes in a frequency distribution is $5$ and the lower class-limit of the lowest class is $10$ The upper class-limit of the highest class is:

1. $15$

2. $25$

3. $35$

4. $40$