a. to find the percentage, we take the total amount of white squares and divide it over the total number of squares. So it's 5/20 = 25%
b. If 80% of the cost is laying the tiles, that means the rest of the cost comes in buying the tiles (20%) this means that the ratio of that would be
80% : 20%
or simplified to
4% : 1%
I can’t see just zoom in a little
Solution: The formula for mean is:

Where:
is the sum of given observations
is the number of observations


rounded to two decimal places
To find the median, we need to first arrange the data in ascending order but we are already given the data in ascending order.
Therefore, the median is:






Therefore, the median = 1.53
Answer:
0.75
Step-by-step explanation: