Jill had the following scores on her math quizzes 20,40,40,40,60,60,60,60,80,80,80,80 ,100. what is the mean score for jill’s quizzes? show your work.

a. what is the total of her quiz scores?

b. how many quizzes did she take?

c. what is the average jill scored on her quizzes?

answer i need !

A.   Add up all of her scores together:

20 + 40 + 40 + 40 + 60 + 60 + 60 + 60 + 80 + 80 + 80 + 80 + 100 = 800

Or you could do multiplication, 4 example, she had 3 scores of 40, so you could do 3(40)

20 + 3(40) + 4(60) + 4(80) + 100 = 800

B. She has:

20 - 1 score

40 - 3 scores

60 - 4 scores

80 - 4 scores

100 - 1 score          She took a total of 13 quizzes since she has a 13 scores

C. (this is basically the mean score)

To find the mean score/average,

you add up all of the scores, then divide the total of her scores by the number of quizzes/scores she had

800 ÷ 13 = 61.5384615385  

(idk if you leave it as a fraction, or if you have to round)

x = -2

y = 848

step-by-step explanation:

plug in the numbers