Edexcel S1 Tutorial 15 Conditional Probability

Watch the video and take down the notes and examples. Pause when prompted to attempt a question then use the exercises suggested to gain further practise

[hemptg]

You were the only one who taught me this, thank you so much!

[AutomotiveIdiot]

you are the best, this is like the pot of gold at the end of the rainbow! pun intended

[georgidanchev]

thank you man.. i hated probability, but it's actually so simple...

[kunalg]

I'm going mad watching your videos, I actually started talking to the screen thinking you were standing behind me in class, I was so in the zone I actually thought I was in s haha omg I'm dying hahahahahahaha

[TsumetaiKiri]

I am not sure so tell me if I'm wrong here, but. The question says "At least a 6 on one of the die", does this not mean that that one die can be 6, 7 or 8, not only 6, hence making the probability of intersection being 2/48 instead of 1/48? If sticking to this theory, then the total probability of A, which is "at least a 6 on one of the die" would be 23/48?
The previous question sounded way different, stating to have 3 on at least one of the die, so the method was completely different.

[MrArnoldsMaths]

Trying to get ahead of the rest I see. Good stuff!

[cinnamon]

3:22 i'm confused why is it divide? shouldn't it be multiply? im sorry if i sound like an idiot.

[MrDrewAbercrombie]

I can't believe I just watched this video a week early by mistake! No wonder it made no sense! :(

[ramakrishnansubramanianuk]

sir shouldnt the answer at 23:54 be 9 not 0.9 because your p(A) without the intersection is 0.2 however you put down 0.18/0.2 whereas it should be 0.18/0.02

[Suesaysboo]

does it get any harder than this (not the tree diagrams)? or is that all we need to know for the exam?

[sojosmiffers]

If you'd put brackets around both the fractions and made them one large fraction you would have got the answer you were looking for :) (so (2/48)/(13/48)

[bishscyzer]

People might call you Mr.Arnold but I prefer JESUS. #LordArnold

[TheRedViperZ]

sir can I ask (by the way i'm not in any of your classes but i'm in yr 9 at QM) what do you use to record your screen with?

[MrArnoldsMaths]

@MrDrewAbercrombie Tomorrows starter: What is next in this sequence? Turtorial 11, Tutorial 12, Tutorial 13,