where n equals the number of events.

First we need to find the values of the function: f(2) = 3 * 2 + 2 = 8, f(3) = 11, f(4) = 14, f(5) = 17, and f(6) = 20. Then we can take the average of the five numbers:

average = (8 + 11 + 14 + 17 + 20) / 5 = 14

To answer this question, you must first calculate John's total points from the four exams. The total points will be equal to four times the original average:

Now, if the 89 is removed, his new total will be:

With the score dropped, his new total number of exams is 3. Therefore, the new average is:

Round this up to 95.67.

To solve this, first calculate the total number of points that Isidore has earned. To find this total, multiply his original average by the original number of exams:

Then, to this you must add his new scores to get the new total:

After taking the two new exams, he has 7 total exams. Therefore, his average is:

This rounds to an 88.57.

To calculate the mean, you will need to figure out each person's height. Start with what we know.

Patrick is 67 inches tall: .

Mike is three inches shorter than Patrick: .

Sally is five inches taller than Mike: .

Find the sum of their heights:

Their average height is therefore:

To answer this, you need to know the total inches of all the plants. You must multiply the number of each type by its respective height:

Then, add these together:

Now, the total number of plants is:

The mean (or average) of this group is:

Round this to the nearest hundreth to get 67.14 inches.

This question is really just asking for the average dollar per page. This could be easily calculated:

However, you might also think of this as a rate problem:

Using the information from the question, we can see that  and .

This comes out to what we solved above:

To solve this, you should first calculate the size of the candles. Based on the description, the group would be:

The sum of this group is:

The average is then found by dividing this total by 5:

The easiest way to think of this problem is to make a list of the accounts (though not all 100, of course).

The largest account will be:

.

So, our list looks like this:

1000, 1100, 1200, . . ., 9700, 9800, 9900

Now we need to identify a pattern. We can pair the first and the last element:

Now, notice what happens when we pair the second and the second from the last element:

This pattern is going to work for the whole list! If there are 100 total accounts, that means that we can make 50 such pairs. That means that we have 50 pairs of $10900. The total account amount is therefore:

The mean will be equal to this total value divided by the number of accounts (100):

The mean is the average of a set of data. In order to calculate this value, we need to take the sum of all the numbers and divide that by the number of values we have:

This gives us:

which finally gives us a mean of: