Question

What is the mean of -3, -8, 12, -15, 9

Answer 1

Answer:

$-1$

Step-by-step explanation:

Step 1:  Combine all of the numbers

$-3 - 8 + 12 - 15 + 9$

$-5$

Step 2:  Find the total amount of numbers

$-3, -8, 12, -15, 9$

5 numbers

Step 3:  Find the mean/average

Sum of numbers / Total amount of numbers

$-5 / 5$

$-1$

Answer:  $-1$

Answer 2

The mean of the -3, -8, 12, -15, 9 is -1

The mean of a data can be obtained by dividing the sum of the data by the number of data i.e

$Mean = \frac{Sum of data}{number of data }$

From the question given above, we obtained the following data:

-3, -8, 12, -15, 9

The Mean of the above data can be obtained as follow:

Sum of data = -3 + (-8) + 12 + (-15) + 9

= -3 - 8 + 12 - 15 + 9

= -5

Number of data = 5

Mean =?

$Mean = \frac{Sum of data}{number of data }\\\\Mean = \frac{-5}{5}$

Mean = -1

Therefore, the mean of the data is -1

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