Answer:
5 items
Step-by-step explanation:
You can think of the graph this way:
each dot is a customer
Therefore if a customer buys 3 items, they become an extra dot on that column of the graph.
What you can then do is multiply the number of items (each column) by how many customers for each column.
Essentially we are trying to calculate how many items were bought in total for each column:
e.g. column 3 had 4 customers: 3 x 4 = 12 items for that column
We then make a list of each column's total items:
0x1, 1x1, 2x2, 3x4, 4x0, etc.
We end up with:
0, 1, 4, 12, 0, 10, 0 ,14, 0, 18, 0, 11
The median is the middle item of the list
We have 12 items, meaning the middle item of the list is actually 2 numbers of our list!
0, 1, 4, 12, 0, 10, 0 ,14, 0, 18, 0, 11
Has it's middle item/s as 10 and 0
But the median is a singular value
So we take the average of 10 and 0
(10 + 0) / 2 = 5
Our answer is 5
