# Can't get my head around Statistics 1 ProbabilityWatch

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#1
Hey!

I'm just finding it hard to understand all the signs and the notations, etc.. in probability chapter in S1. I'm currently doing some past papers and i always get stuck on the probably questions, any ideas on how to understand it better?
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2 years ago
#2
I guess it's just to come back to basics understanding what union and intersection actually means. Understanding basic stuff like OR rule and the AND rule for independent events.
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2 years ago
#3
(Original post by bhfn)
Hey!

I'm just finding it hard to understand all the signs and the notations, etc.. in probability chapter in S1. I'm currently doing some past papers and i always get stuck on the probably questions, any ideas on how to understand it better?
Just remember that the AND symbol looks like a capital N, whilst the OR symbol looks like a capital U. Also note that OR in mathematics means either A or B or both, whereas in ordinary English, we often use "or" to mean A or B but not both. This is something that often catches people out.
The | symbol means "given that", which usually implies that you'll need to divide probabilities and/or use Bayes' Theorem.

Those are the only symbols specific to probability that I can think of. Everything else should be known from your general knowledge of mathematics.
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