Tips And Tricks And Shortcuts For Probability Questions
July 27, 2023
Tips and Tricks and Shortcuts for Probability
The Event which is likely to occur, measured by the ratio of the Favourable cases to the whole number of cases possible , known as Probability. In this Page Tips and Tricks for Probability is given.
Values of Probability:
Value of Probability lies between 0 and 1.
Value of Probability 0 will be for Impossible Event.
Value of Probability 1 will be for Sure Event.
Tips for Probability
Probability is a measure of the likelihood of an event occurring, which is determined by the ratio of favorable outcomes to the total number of possible outcomes.
The formula for calculating probability is:
P(E) = \frac{Number of Favorable Outcomes}{Total Number of Possible Outcomes}
In mathematical terms, Probability represents the ratio of desired outcomes to the total number of possible outcomes.
When solving probability questions, if it is easier to find the probability of an event not happening, you can calculate that probability and subtract it from 1.
When encountering the term “or” in a question, Use addition (+) when applying the Fundamental Principle of Counting to solve the problem.
When encountering the term “and” in a question, Use multiplication (x) when applying the Fundamental Principle of Counting to solve the problem.
Tips and Tricks for Probability Questions and their solution
Question 1. A die is rolled, find the probability that an even number is obtained ?
Options
(a) \frac{3}{4}
(b) \frac{1}{2}
(c) \frac{1}{4}
(d) None of these
Solutions Let us first write the sample space, S of the experiment.
S={1,2,3,4,5,6}
Let E be the event “an even number is obtained” and write down.
E= {2,4,6}
We can use the formula of the classical probability.
Thanks for your tips and tricks
It’s very useful for me to solve probability related sums