The difference in their mean score is 0.
What is the mean score?
The mean is the arithmetic average of a set of given numbers.
Bella and Isaac take a weekly quiz in their math class.
Their grades on each of the ten first quarter quizzes are shown below.
The Bella grades are;
100, 90, 70, 80
The mean of Bella's grades is;
[tex]\rm Mean =\dfrac{Sum \ of \ all \ values}{Number \ of \ values}\\\\Mean =\dfrac{100+90+70+60}{4}\\\\Mean =\dfrac{320}{4}\\\\Mean =80[/tex]
The Isaac grades are;
100, 90, 80, 50
The mean of Isaac's grades is;
[tex]\rm Mean =\dfrac{Sum \ of \ all \ values}{Number \ of \ values}\\\\Mean =\dfrac{100+90+80+50}{4}\\\\Mean =\dfrac{320}{4}\\\\Mean =80[/tex]
The difference in their mean score is;
Difference = Bella's grades - Isaac's grades
Difference = 80 - 80
Difference = 0
Hence, the difference in their mean score is 0.
Learn more about mean value here;
https://brainly.com/question/17126186
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