Following is the choice of sweets of$30$students of class$\mathrm{VI}:$

Ladoo, Barfi, Ladoo, Jalebi, Ladoo, Rasgulla, Jalebi, Ladoo, Barfi, Rasgulla, Ladoo, Jalebi, Jalebi, Rasgulla, Ladoo, Rasgulla, Jalebi, Ladoo, Rasgulla, Ladoo, Rasgulla, Jalebi, Ladoo, Rasgulla, Ladoo, Ladoo, Barfi, Rasgulla, Rasgulla, Ladoo.

Which sweet is preferred by most of the students$?$

Define the following term:

Observations

Define the following term:

Data

Define the following term:

Frequency of an observation

Define the following term:

Frequency distribution

The final marks in mathematics of $30$ students are as follows:

$$\begin{gathered} 53, 61, 48, 60, 78, 68, 55, 100, 67, 90 \\ 75, 88, 77, 37, 84, 58, 60, 48, 62, 56 \\ 44, 58, 52, 64, 98, 59, 70, 39, 50, 60 \end{gathered}$$

Arrange these marks in the ascending order $30$ to $39$ one group, $40$ to $49$ second group, etc.

The final marks in mathematics of $30$ students are as follows:

$$\begin{gathered} 53, 61, 48, 60, 78, 68, 55, 100, 67, 90 \\ 75, 88, 77, 37, 84, 58, 60, 48, 62, 56 \\ 44, 58, 52, 64, 98, 59, 70, 39, 50, 60 \end{gathered}$$

What is the highest score?

The final marks in mathematics of $30$ students are as follows:

$$\begin{gathered} 53, 61, 48, 60, 78, 68, 55, 100, 67, 90 \\ 75, 88, 77, 37, 84, 58, 60, 48, 62, 56 \\ 44, 58, 52, 64, 98, 59, 70, 39, 50, 60 \end{gathered}$$

What is the lowest score?

The final marks in mathematics of $30$ students are as follows:

$$\begin{gathered} 53, 61, 48, 60, 78, 68, 55, 100, 67, 90 \\ 75, 88, 77, 37, 84, 58, 60, 48, 62, 56 \\ 44, 58, 52, 64, 98, 59, 70, 39, 50, 60 \end{gathered}$$

What is the range?