Question

What is the mean score for Mr. Wilson's test scores? Round to the nearest tenth.

Answer 1

Answer:  The required mean score is 73.93.

Step-by-step explanation:  We are given to find the mean score for Mr. Wilson's test scores.

We know that

the mean of a given set of scores is equal to the sum of the scores divided by the number of students who scored the marks.

From the given information, we have

3 students with score 40, 1 student with score 50, 4 students with score 60, 6 students with score 70, 4 students with score 80, 8 students with score 90 and 2 students with score 100.

Therefore, the MEAN score of Mr. Wilson's test scores is given by

$M\\\\\\=\dfrac{3\times40+1\times50+4\times60+6\times70+4\times80+8\times90+2\times100}{3+1+4+6+4+8+2}\\\\\\=\dfrac{120+50+240+420+320+720+200}{28}\\\\\\=\dfrac{2070}{28}\\\\=73.93.$

Thus, the required mean score is 73.93.

Answer 2

To find the mean, you have to find the sum of all of the number amounts. That equals 28. Then you divide the sum with the amount of numbers you added up, which in this case would be 7. 28/7 is 4.

You're answer would be 4. I hope this helps :)