This will be 18.39, 6 is higher than 5, so the 8 is going higher so it's a 9 and you will get 18.39
It’s either C or B but I’m not sure
Explanation
Part A
We can use the formula below to find the mean.

We will then have;

Mean = 6.2632
Part B
Since the data set is odd.

Answer: From the column of cumulative frequency cf, the median is 7
A. none it is oveer 180 and a triangle must equal 180 degrees