5) Rolanda scored 20, 15and 16 on hefirst three mathquizzes. Jetta scored 16, 19and17 on her quizzes Usingthe mean to compare, whohas the higher math quizscores so far?

To find mean/average it's fairly simple!! :)

The first thing you should do is add up the first numbers -
20 + 15 + 16 = 51 :)
16 + 19 + 17 = 52

Now divide each of the scores by the amount of numbers there is -
20 (1) 15 (2) 16 (3)
16 (1) 19 (2) 17 (3)

51 ÷ 3 = 17 (Rolanda's Average Score)
- Which # is bigger?
52 ÷ 3 = 17.3 (Jetta's Average Score)

Answer Link

Jennnyyy Jennnyyy · Answer 2 · 2016-05-16T01:55:35-04:00

First, whats the defintion of mean? Ill tell you:)
Mean: The mean is the average of the numbers; a calculated (central) value of a set of numbers.
How to find it? We add all of the scores together and then divide them by the number of scores.

\(*\) So first lets work on Rolanda's Mean.
They gave us the numbers 20, 15, and 16

1st. Lets add
20 + 15 + 16 = 51

2nd. Divide by 3 since their are 3 test scores
51 ÷ 3 = 17
So rolanda's mean is 17!

\(*\) Now lets work on Jetta's mean.
They gave us the numbers 16, 19, and 17

1st. Lets add.
16 + 19 + 17 = 52

2nd. Divide by 3 since their are 3 test scores.
52 ÷ 3 = 17.333333333333333
So jetta's mean is 17.333333333333333

Now lets compare:)
Rolanda's mean = 17
Jetta's mean = 17.33333333333333333

Obviously, whos is bigger?
Jetta's Mean is bigger :)

Hope this helps!
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