IntMath forum | Counting and Probability - Introduction

i face difficulty to understand permutation and combinations can you give easy method to understand

Relevant page

<a href="/counting-probability/3-permutations.php">3. Permutations</a>

What I've done so far

Read the pages many times.

Hi Shaikshavali

I guess you have already seen these pages:

<a href="/counting-probability/3-permutations.php">3. Permutations</a>

<a href="/counting-probability/4-combinations.php">4. Combinations</a>

The main difference is that when we are considering permutations, the order is important. So we regard a,b,c,d as different to a,d,c,b.

For combinations, the order is not important. So a,b,c,d is considered the same as a,d,c,b.

I missed that difference! I've got it now. Thanks.

Reply

You need to be logged in to reply.

Related Counting and Probability questions

• Re: Poker Odds [Solved!]
  @dmf: I suspect calculating the final probabilities would be quite involved, as the page you... Murray 07 Feb 2020, 05:14
• Determining Lambda for a Poisson probability calculation [Solved!]
  I want to apply the Poisson distribution on highway robberies and highway accidents events to... Aetius 29 Dec 2018, 09:53
• Permutation with restriction [Solved!]
  Hello everybody. I have the following problem. Three irrigation events should implemented in a 19days... Ioannis 06 Dec 2018, 03:20
• Independent vs non-mutually exclusive [Solved!]
  Section 9, example 2, it is stated that the events are not mutually exclusive. Why are... phinah 03 Aug 2017, 04:30
• Re: Permutations - the meaning of "distinct" and "no repetitions" [Solved!]
  Hello Mansoor 1. Yes, a "distinct" resistor in this case would mean each one has a... Murray 19 Jun 2017, 08:07

Counting and Probability lessons on IntMath

• Counting and Probability - Introduction
• 1. Factorial Notation
• 2. Basic Principles of Counting
• 3. Permutations
• 4. Combinations
• 5. Introduction to Probability Theory
• 6. Probability of an Event
• Singapore TOTO
• Probability and Poker
• 7. Conditional Probability
• 8. Independent and Dependent Events
• 9. Mutually Exclusive Events
• 10. Bayes’ Theorem
• 11. Probability Distributions - Concepts
• 12. Binomial Probability Distributions
• 13. Poisson Probability Distribution
• 14. Normal Probability Distribution
• The z-Table
• Normal Distribution Graph Interactive

top