Question

What is the mean of the following numbers?

4, four, six, seven, seven, eight, eight, nine, nine, 18

Answer 1

To find the mean of the numbers provided, we first need to convert words into numbers and then sum them up.

The numbers in word form are:
- four = 4
- six = 6
- seven = 7 (two times)
- eight = 8 (two times)
- nine = 9 (two times)

Now writing the numbers in numerical form, we have:
4, 4, 6, 7, 7, 8, 8, 9, 9, 18

Next, we calculate the sum of these numbers:
\[
4 + 4 + 6 + 7 + 7 + 8 + 8 + 9 + 9 + 18 = 4 + 4 = 8; \\
8 + 6 = 14; \\
14 + 7 = 21; \\
21 + 7 = 28; \\
28 + 8 = 36; \\
36 + 8 = 44; \\
44 + 9 = 53; \\
53 + 9 = 62; \\
62 + 18 = 80.
\]

The total sum is 80.

Now we count how many numbers we have:
We have 10 numbers in total.

Finally, to find the mean, we divide the sum by the number of entries:
\[
\text{Mean} = \frac{\text{Sum}}{\text{Count}} = \frac{80}{10} = 8.
\]

Thus, the mean of the numbers is **8**.