2025 AHS PRELIMS P1 Q13

2025 AHS PRELIMS P1 Q13

Secondary 4
5 marks

The table shows the number of books read by some students last month.

Number of books\(0\)\(1\)\(2\)\(3\)
Frequency\(1\)\(3\)\(x\)\(5\)
  1. Show that the mean value of the data is 2.[2]
  2. The standard deviation of the data is 1. Find the value of \(x\).[3]

Solution:

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Answer:(a) Mean \(=2\) (b) \(x=3\)

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