Each dot in the figure above represents one of the 21 student drivers who were given a practice test. If the students made from 2 to 8 errors each, what was the total number of errors made by the 21 student drivers?

Rationale

The total number of errors made by the 21 student drivers is 104.

To find the total number of errors, we multiply the number of students by the average number of errors made. Given the range of errors from 2 to 8, we can calculate the total by summing the individual errors indicated by the data points represented by the dots.

A (86) YOUR ANSWER

This option suggests that the total number of errors is 86. However, if we analyze the data correctly, the sum of the errors made by all students exceeds this number. Therefore, 86 is not a plausible total for the errors made by 21 students within the specified error range.

B (98) YOUR ANSWER

This choice indicates a total of 98 errors made by the students. While this figure is closer to the correct total than option A, it still does not account for the actual errors calculated from the data, which surpasses this total. Thus, 98 is also incorrect.

C (101) YOUR ANSWER

Selecting 101 errors implies a total that is still less than the actual number calculated from the students' performance. Although it is a reasonable attempt, this figure does not represent the correct aggregation of errors made by the 21 student drivers.

D (104) CORRECT

This option accurately reflects the total number of errors made by the 21 student drivers. Upon summing the errors, it becomes clear that the students collectively made 104 errors in total, making this the only correct choice.

Conclusion

The calculation of total errors among the 21 student drivers, who made between 2 to 8 errors each, results in a total of 104 errors. This figure is confirmed by analyzing the error data represented in the figure, demonstrating that options A, B, and C do not reach the correct total. Thus, 104 stands as the accurate representation of total errors made.

Each dot in the figure above represents one of the 21 student drivers who were given a practice test. If the students made from 2 to 8 errors each, what was the total number of errors made by the 21 student drivers?

The total number of errors made by the 21 student drivers is 104.

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