Erin will start reading on page 60 and will stop reading on page 83.

If you subtract these two numbers, you will get the number of pages between 60 and 83:

$\displaystyle 83$ - $\displaystyle 60$ $\displaystyle =23$

However, this subtraction does not include the first page read - page 60. Consider a similar, more simpler case: reading from pages 1 to 3. There are three pages read there: 1, 2, and 3. If you subtract, you get an answer of 2, which leaves you one page short of what you actually read.

So when you subtract 60 from 83, it gives you the pages between those two markers. You need to add on one more page to get your total page count - that is, to include page 60.

Therefore, Erin will read 24 pages.

The range is a measure of spread. It is the difference between the largest and the smallest data values. So we get:

$\displaystyle Range=93-61=32$

The range is a measure of spread. It is the difference between the largest and the smallest data values. So we can write:

$\displaystyle 41-x=26\Rightarrow x=15$

The "stem" of this data set represents the tens digits of the data values; the "leaves" represent the units digits. 

The midrange of a data set is the arithmetic mean of its greatest and least values, which, in this case, are 47 and 87. Their arithmetic mean is $\displaystyle \left (47 + 87 \right )\div 2 = 67$, the midrange.

To determine the range, first order the numbers in order from least to greatest. Then, find the difference between the greatest number and the least number:

$\displaystyle 78, 98, 100, 144, 194, 207, 250$

$\displaystyle 250 - 78 = 172$

Thus, the range is 172.

The range of a set is determined by subtracting the smallest number from the largest number:
$\displaystyle range=22-6=16$

Reorder the numbers from smallest to largest:

7, 14, 19, 22, 30, 31, 47

The range is the difference between the largest and smallest values:

$\displaystyle range=47-7=40$

Find the range of the following data set:

$\displaystyle 45,67,12,34,55,88,67,343,49$

Begin by putting your numbers in increasing order:

$\displaystyle 12,34,45,49,55,67,67,88,343$

Next, find the range by subtracting our first number from our last number:

$\displaystyle Range=343-12=331$

So our answer is 331

Find the range of the following data set:

$\displaystyle 5,76,12,34,55,89,76,109,67,33,9$

Let's begin by rearranging our terms from least to greatest:

$\displaystyle 5,9,12,33,34,55,67,76,76,89,109$

Now, find the difference between our largest and smallest terms:

$\displaystyle 109-5=104$

So, our answer is 104

Find the range of the following data set:

$\displaystyle 34,56,76,12,33,43,98,99,77,93,33$

First, let's put our terms in increasing order:

$\displaystyle 12,33,33,34,43,56,76,77,93,98,99$

Next, our range will just be the difference between the greatest and least terms.

$\displaystyle 99-12=87$

So our range is 87.