Statistics Test...

$$0 - 10, 10 - 20, 20 - 30 ,...$$ are the classes, then the lower boundary of the class $$20 - 30$$ is _____

$$1 - 5, 6 - 10, 11 - 15 ,...$$ are the classes of a distribution, the upper boundary of the class $$1 - 5$$ is _____

The class marks of intervals $$20-30$$ and $$10-20$$ are:

In a frequency distance with classes $$0-10, 10-20$$ and so on, the size of class interval is $$10$$. lower limit of fourth class is

Total number of students in all are:

Frequency of $$48$$ is

If the passing marks are $$41$$, the no of students that failed is

No. of students weighing less than $$56$$kg are

What is the minimum height possible of the tallest student?