# Data Handling

#### Summary

LearnNext Lesson Video

Data
Data is a collection of numbers gathered to get some information.

To get the required information, all observations should be recorded.
Tally marks are used to organise the observations. Record every observation by a vertical mark, but every fifth observation should be recorded by a mark across the four earlier marks, like this:.  We depict each observation with the help of tally marks.

For example,  a group of persons and their sizes of shoes. The tabular form representing the tally marks is as shown here.

a=7, b=4, c=0.

### 2 . What does Ratio has to do with proportion please answer

comparison of 2 numbers by dividing is called ratio whearas the equality of 2 ratios is called proportion

### 3 . why bargraph is made in graph paper

to show graphs &make it easy.

### 4 . These are the questions you would ask.And must be answserd

What does eqution means?
A statement denoting the equality of two expressions is called an equation.
For ex...

A=C+6
and,..A=B+5
A=B+C+11
A-C=B+11
5=C+11
C=  -6
B-(-6)=1
B=-6+1=-5
...