In a test, the average score of 10 students in a class was 90. If 40% of the students scored 100, and 10% scored 80, what was the average score of the rest of the students?

In the class of 10 students, 40 percent represents 4 students and 10 percent represents 1 student, leaving 5 students in the rest of the group. The total score for the class is 10 multiplied by 90, which is 900. The 4 students scored a total of 400 and the 1 student scored 80, so the remaining 5 students have a combined score of 900 minus 480, which is 420. The average score of these remaining students is 420 divided by 5, giving 84.

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