The number 3,6,9,12,4,6,8,10,12,14 have a sum of 84. If 12 numbers have an mean if 8, they have to have a sum of 96. So, the final 2 numbers have to total 12. Since the mode has to be 6 with these numbers, and right now the numbers are bi-modal with 6 and 12, then one of these numbers has to be 6. Given that and their sum as to be 12, **both numbers have to be 6**. So, we would have:

3,6,6, 6, 9,12,4,6,8,10,12,14

For the 12 numbers.

For the median, we are looking for the middle of the 12 numbers. First, we have to put them in numerical order:

3, 4, 6, 6, 6, 6, 8, 9, 10, 12, 12, 14

The median is the middle value of these numbers. However, if you consider, there isn't one single "middle value". 6 and 8 are the middle values. In this case, we take the average of the middle values:

(6+8)/2 = 7

**So, 7 is the median value for these numbers.**

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