Types of events

In mathematics, the study of probability theory can be considered as a part of mathematics. In the probability theory we generally perform the calculation of finding the likelihood occurrence that is related to any particular event. It means to say that when an event occurring so many times; at that time we are not able to predict what will be the outcome at each and every time. So at that we use the concept of probability to find out the probability for outcome of any event.  In the simple we can say that probability is the most important concept of mathematics that deals with the calculation of likelihood of a given event’s occurrence. In probability theory, an event which is related to the probability can be expressed in the form of number range from one to zero.
 In the probability theory, anything that happens is named as events. It means to say that event is a term which is used to show the outcome on the occurrence of something. In the probability theory events can be categorized in different types of events. The Types of events are (a) independent event (b) dependent event.
Independent event: independent events are those events which has the no effect by any other type events. It means to say that the outcome of any event must not be dependent on another event. These events are considered as independent event. Suppose you toss a coin two times , in first it comes ‘tail’ then at that time you are not able to predict what will be the second outcome form the second toss. This thing is known as independent event.
Dependent event: Dependent events are those events whose outcome depends on outcome of another event. Suppose: there we select a card form a pack of card. The card is of heart of king. Now if we want to pick the next card then it will sure that the next card will not be king of heart. This event is known as dependent event.
In the next session we are going to discuss conditional probability, Grade IX.

Data representation methods

In statistics we have several methods of data representation that are used for represent the data in a specified manner that means once data is collected by the person or group of persons that is related with the specific experiment is then it will be presented in the way that user of data can understand it very easily and it is not used only for present scenario but also it will be used in future for making some decisions or for comparing the results of different years , so there are some well defined methods of data representation in statistics that helps the user of data to make efficient and effective decision very efficiently in very short span of time .These Data representation methods are as follows :
Data will be represented in the tabular form that will support to understand the data with its entire attributes.
For representing the data there one more technique that is known as graphs or pie charts that will help in understanding the way how data is changed in the particular environment or for specific experiment .
We can also draw some charts for representation of data.
The graphs are also categorized in some types that are line graph or histogram or bar graph or pyramids etc.
So for presenting the data there should some step that must be follow by the user for making the graphs or charts as: (know more about cbse sample papers for class 10, here)
First of all a suitable scale will be selected by the user.
After selection of scale follow all the design as index, directions and titles etc.
After it user select the appropriate way for representing the data that data will represent in two dimensional ways or in three dimensional ways.
In the next session we will discuss about conditional probability.