Answer:

A. Find the mean

the mean is = 9.6

B. Find the median

1, 7, 8, 9, 9, 10, 10, 10, 10, 10, 11, 13, 19

the median is = 10

C. Find the mode

the mode is = 10

Step-by-step explanation:

A. add all the numbers then divide the sum by the number of values.

The mean means average.

10, 10, 10, 10, 11, 13, 19, 9, 9, 8, 1, 7, 8 = 125

number of values(number of students) = 13

125 divided by 13 is 9.6

so 9.6 is the average score

B. to find the median, arrange from lowest number to the highest. Since there's no middle number I added 10 and 10 result to 20 and divided it to 2, equals to 10.

C. to find the mode there has to be a same 3 sets of number, since there are four number 10, it becomes the mode