An event A has a 70% chance of occurring, an event B has a 40% of occurring and the event (A n B) has a 20% chance of occurring. The events are not unrelated.(adsbygoogle = window.adsbygoogle || []).push({});

If A does not occur what is the probability of B?

notation A' means (not A)

I have tried to use the formula P(B|A') = P(B n A')/P(A')

However Not sure if that's the right way to go and if A' would be equal to .3.

Please Help :)

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# Conditional Probability

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