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The problem provides a line plot showing the number of pull-ups some friends did in a contest. The question asks how many participants did exactly 4 pull-ups.

Probability and StatisticsData InterpretationLine PlotCounting
2025/3/6

1. Problem Description

The problem provides a line plot showing the number of pull-ups some friends did in a contest. The question asks how many participants did exactly 4 pull-ups.

2. Solution Steps

To solve the problem, we need to count the number of 'x' marks above the number 4 on the line plot. Counting the 'x' marks, we see that there are 8 'x' marks. Therefore, 8 participants did exactly 4 pull-ups.

3. Final Answer

8

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