the table displays the scores of students on a recent exam. find the mean of the scores to the nearest 10th…

the table displays the scores of students on a recent exam. find the mean of the scores to the nearest 10th. score number of students 70 1 75 7 80 2 85 6 90 4 95 1 100 4

the table displays the scores of students on a recent exam. find the mean of the scores to the nearest 10th. score number of students 70 1 75 7 80 2 85 6 90 4 95 1 100 4

Answer

Explanation:

Step1: Calculate the sum of products

Multiply each score by the number of students and sum them up. $(70\times1)+(75\times7)+(80\times2)+(85\times6)+(90\times4)+(95\times1)+(100\times4)=70 + 525+160 + 510+360+95+400 = 2120$

Step2: Calculate the total number of students

Sum up the number of students. $1 + 7+2+6+4+1+4=25$

Step3: Calculate the mean

Divide the sum of products by the total number of students. $\frac{2120}{25}=84.8$

Answer:

$84.8$