The mean is the average of the numbers.
R-3.6.2 for Windows (32/64 bit) Download R 3.6.2 for Windows (83 megabytes, 32/64 bit) Installation and other instructions; New features in this version. Two consecutive even numbers can be 10, 12 2 10 5 5 1 2 12 2 6 3 2 1 HCF of 10 & 12 Ex 3.6, 2 What is the HCF of two consecutive (c) odd numbers? Two consecutive odd numbers can be 9, 11 HCF of 9 & 11 3 9 3 3 1 2 11 2 1 9 = 3 × 3 11 = 11 Since there are no common factor HCF = 1.
It is easy to calculate: add up all the numbers, then divide by how many numbers there are.
- Adding a negative number is the same as subtracting the number (without the negative). For example 3 + (−2) = 3−2 = 1. Knowing this, let us try an example: Example 3: Find the mean of these numbers: 3, −7, 5, 13, −2. The sum of these numbers is 3 − 7 + 5 + 13 − 2 = 12.
- Numbers lets you build beautiful spreadsheets on a Mac, iPad, or iPhone — or on a PC using iWork for iCloud. And it’s compatible with Apple Pencil.
In other words it is the sum divided by the count.
Example 1: What is the Mean of these numbers?
6, 11, 7
- Add the numbers: 6 + 11 + 7 = 24
- Divide by how many numbers (there are 3 numbers): 24 / 3 = 8
The Mean is 8
Why Does This Work?
Numbers 3 6 9 Pdf
It is because 6, 11 and 7 added together is the same as 3 lots of 8:
It is like you are 'flattening out' the numbers
Example 2: Look at these numbers:
3, 7, 5, 13, 20, 23, 39, 23, 40, 23, 14, 12, 56, 23, 29
The sum of these numbers is 330
There are fifteen numbers.
The mean is equal to 330 / 15 = 22
The mean of the above numbers is 22
Negative Numbers
How do you handle negative numbers? Adding a negative number is the same as subtracting the number (without the negative). For example 3 + (−2) = 3−2 = 1.
Knowing this, let us try an example:
Example 3: Find the mean of these numbers:
3, −7, 5, 13, −2
- The sum of these numbers is 3 − 7 + 5 + 13 − 2 = 12
- There are 5 numbers.
- The mean is equal to 12 ÷ 5 = 2.4
The mean of the above numbers is 2.4
Here is how to do it one line:
Mean = 3 − 7 + 5 + 13 − 25 = 125 = 2.4
Numbers 3.6.2 Download
Try it yourself!
Numbers 36 1-13
Now have a look at The Mean Machine.
Numbers 3 6 9 Tesla
Advanced Topic: the mean we have just looked at is also called the Arithmetic Mean, because there are other means such as the Geometric Mean and Harmonic Mean.