2025 PHS PRELIMS P1 Q24

Eighteen students took a test. Their scores are shown below.

Key: 1|3 means 13.

1. Given that the median score is 15, find
   1. the modal score,[1]
   2. the value of \(p\).[1]
2. The students are grouped by \(0<x\leq10\), \(10<x\leq20\), and \(20<x\leq30\) on a pie chart. Find the angle \(\theta\) for \(0<x\leq10\).[1]
3. The same data is represented by the box-and-whisker plot below. Find (a) and (b).[2]