Praxis 5511 Practice Test Practice Question
Maria's math teacher gives 8 quizzes that are each worth 10 points. Maria's quiz scores are shown. To compute the semester quiz average, the teacher drops the highest and the lowest scores and computes the average (arithmetic mean) of the remaining scores. What is Maria's semester quiz average?
Correct Answer: B
Rationale: To find Maria's semester quiz average, the highest and lowest scores must be removed before calculating the average of the remaining scores. After identifying and eliminating these scores, the sum of the remaining scores is divided by the number of quizzes left, which is 6.
Option A (5) is incorrect as it suggests an average that is too low, not reflecting the scores after dropping the extremes. Option C (7) underestimates the average, as it does not account for the higher remaining scores. Option D (8) overestimates the average, implying a higher performance than what the remaining scores indicate. Thus, the average of the adjusted scores correctly computes to 6.
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