Th the mean of the data is set 15 what number is missing
18,16_,9,12,23

The missing number on the given data set is 12.

Step-by-step explanation:

Here, the set of data = 18,16_,9,12,23

Let us assume the missing number in the data = m

The mean of the data = 15

Total number of observations   = 6

Now, Sum of the data  = 18 + 16 + m + 9+ 12+ 23  = 78 + m

Also,

or, m  = 12

Hence, the missing number on the given data set is 12.

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step-by-step explanation: