S1 Oct 2025 | Q3 Explained | P84842A | WST01 01 Edexcel Statistics

In this video, I solve Question 3 from the Pearson Edexcel IAL Statistics 1 October 2025 paper.

This question covers:

* Probability function of a fair die
* Discrete uniform distribution
* Expected value
* Using E(aY+b)=aE(Y)+b

Final key results:

* P(Y=y)=\frac{1}{6}, for y=1,2,3,4,5,6
* Distribution: discrete uniform distribution
* E(Y)=3.5
* E(4Y+3)=17

This is a simple but important Edexcel S1 probability distribution question, explained step by step for exam preparation.

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Видео S1 Oct 2025 | Q3 Explained | P84842A | WST01 01 Edexcel Statistics канала Infinity Maths Pro