The ratio of the number of outcomes favourable for the event to the total number of possible outcomes is termed as probability. In other words, a measure of the likelihood of an event (or measure of chance) is called probability. The basic terms involved in probability are listed below:

Experiment is one of several possible outcomes that are obtained from any process.

Outcome is the possible results of a trail in an experiment are called as outcomes.

Sample space is the possible outcomes of the experiment.

Events are the subsets of the sample space.

Example 1:

Consider an experiment of playing cards.

 The shapes in the deck of cards are listed below:

 
Obtain the sample space for a deck of cards.

 Each shape in the deck of cards has numbers from 2 to 10, Ace (A), Jack (J), Queen (Q), and King (K). Therefore, the number of cards in each type is 13. Thus, the total number of cards is
.
Sample events are as follows:

N : Drawn card is a 5.

S : Drawn card is a spade.

Probability line:

The value of probability lies between 0 and 1.
   Consider an experiment of tossing a fair coin three times.

If tossing a fair coin three times, then the probability of getting exactly two head is obtained below:

The sample space for tossing a fair coin three times is,   Thus, the probability of getting exactly two head is,

 

Transcribed Image Text:

J K A J K A

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Trials are the process of performing an experiment Probability of an event is the measure of the likelihood of that event There are three types of probabilities 1 Experimental probability 2 Theoretica... View the full answer