You need to order the data, so 11, 12, 13, 14, 14, 15, 17, 17, 18, 18, 18, 20 Then find the middle of the data. Because there are 12 data points, the median will lie between the two 6th placed numbers The two numbers are 15 and 17, so work out the mean of them. (15+17)/2 = 16 So the answer is B. 16
So you move left to right like PEMDAS when it comes to adding or subtracting either or could go first and same thing applies with multiplying and dividing so for instance in this case
