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PIMSO 2025 - Mathematics - Secondary 2 - National Round Question 30

PIMSO Maths · PIMSO 2025 - Mathematics - Secondary 2 - National Round

Question 30

A class of students took a math test scored out of 100. The teacher recorded the scores of 49 students, which had a mean of 68 and a median of 70. Later, the teacher realized that one more student’s score was missing — a student who scored 100 on the test. What is the different between median and mean, assuming the original 49 scores were ordered and the new score is added at the end?

Editorial note: Check whether the supplied statistics determine the new median.

Original choices: A. 0.64; B. 1.00; C. 1.36; D. 2.00