Find the median and mean of the data set below:5, comma, 42, comma, 24, comma, 43, comma, 345,42,24,43,34

First, let's organize the data set in ascending order: 5, 24, 24, 34, 42, 42, 43, 43, 345.

Next, let's find the median. The median is the middle number in a sorted, ascending or descending, list of numbers. This data set has 9 numbers, so the median is the 5th number, which is 42.

Now, let's find the mean. The mean is the average of the numbers. It is easy to calculate: add up all the numbers, then divide by how many numbers there are.

So, (5 + 24 + 24 + 34 + 42 + 42 + 43 + 43 + 345) ÷ 9 = 602 ÷ 9 = 66.89 (rounded to two decimal places).

So, the median of the data set is 42 and the mean is 66.89.