Re: Scores of boys in a certain class have a range of 20.4 and scores of g
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08 Jul 2025, 04:00
- Option A is insufficient because medians do not provide information about the extremes of the data.
- Option B is sufficient because it precisely defines the relationship between the highest boy's score and the lowest girl's score, allowing us to calculate the overall range as 49.
- Option $\(\mathbf{C}\)$ is insufficient because the "at most" condition allows for variability in the relationship between $\(G_{\text {max }}\)$ and $\(B_{\text {max }}\)$ (e.g., $\(G_{\text {max }}\)$ could be less than $\(B_{\text {max }}\)$ ), leading to different possible overall ranges.
Therefore, the official answer being $B$ is correct.