Mean is the average number in the data set.
To get the average we first add all the numbers.
After we add all these numbers we then divide by the number of numbers in the data set.
So we do 22+18+38+6+24+18 which is equal to 126 there are six numbers so we divide 126 by 6. This gives us a mean of 21.
ANOTHER EXAMPLE:
Another example of this is the data set (4,65,7,34,5)
We first add all the numbers and get 115 then we divide by 5 and get 23 as the mean.
Answer:
The answer is A.
Step-by-step explanation:
Basically as it says, the first length is 5 more than the second and the third is 7 more than the first.
Answer:
Step-by-step explanation:
The most important part of this question is the estimation. That means you round either up or down to get whole numbers.
You can make - 37.44 either - 40 or - 35
You can make 4.8 into 5
So the answer should lie between -40/5 = - 8
or
The answer should be between - 35/5 = - 7
Use your calculator to check it.
-37.44 ÷ 4.8 = - 7.8
This skill is very handy when shopping or writing a test. It you get an outrageous answer like - 21.44 you know you have done something wrong.
Given:
24,000 books
Between 3 and 4 books will have a printing error in every
3000 printed books
Find: in the
24000 books, the total number of books that will have a printing error
Solution:
Based from the given,
we need to know how many sets of 3000 we
have in the 24000
books so:
24000 / 3000 = 8
Now, in each set of
3000 we have between 3 and 4 errors and we have 8 sets of 3000 books:
minimum errors 3 * 8 =
24
maximum errors 4 * 8 =
32
Therefore, at this
rate, the number of books that will have a printing error in the
24000
<span>will be between 24 and
32 or 24 < E < 32.</span>
