The average test score of 8 students in a class is 92. Two slacker kids join the class and the test average drops to 88. If one of the slacker kids scored an 80, what did the other slacker kid score?
10 * 88 = 880
880 - (92 * 8) - 80 = s
? - s
Is the answer 64?
To find the score of the other slacker kid, we can use the fact that the average test score of the 10 students is 88.
First, let's calculate the sum of the scores of the 8 original students. We know that the average test score of those 8 students is 92. Multiplying the average by the number of students, we get a total score of 8 * 92 = 736.
Next, let's calculate the sum of the scores of all 10 students, including the two slacker kids. Since the average test score of the 10 students is 88, multiplying the average by the number of students, we obtain a total score of 10 * 88 = 880.
To find the score of the other slacker kid, we subtract the sum of the scores of the original 8 students from the sum of the scores of all 10 students. So, 880 - 736 = 144.
Therefore, the other slacker kid scored 144 on the test.