Event
Chapter Name : Probability |
Sub Topic Code : 104_11_16_03_01 |
Topic Name : Event |
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Sub Topic Name : Event |
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Introduction
When two bulbs are selected from a lot, the possible outcomes are four which can be counted as: (i) both bulbs are defective (ii) first is defective and second is good (iii) first is good and second is defective (iv) both are good. The case when both the bulbs are good is a special one out of four and is known as event.
Pre-Requisites:
Idea about numbers, permutations and combinations, probability and sample space.
Activity:
Visit the website: http://mathforum.org/dr.math/faq/faq.prob.world.html to learn about the probability use in real life.
Real Life Question:
A jar contains 2 red marbles, 3 blue marbles, and 1 green marble. What are the chances that you pick out a red marble?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Event | Any subset E of the sample space S is called an Event. Alternatively, Event is a subset of sample space. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Pack of cards | Draw a random card from the pack and predict whether it is red or black! |
Real life uses :
Probabilities is used to control the flow of traffic through a highway system, a telephone interchange, or a computer processor; find the genetic makeup of individuals or populations; figure out the energy states of subatomic particles; Estimate the spread of rumors; and predict the rate of return in risky investments.
Practical examples around us
| Examples | Explainations |
|---|---|
| Weather forecasting | Meteorologists use probability based on the data collected over the year to forecast the weather. The data collected over the years is the sample space. The case whether it will rain today is an event. |
What you learn in Theory:
What is an event in probability?
What you learn in Practice:
How to find the probability of an event.