Quick Question Thread

[Ad Lib]

Anyone know how to work out Probability? Its probably pretty basic but I've got a tonne of homework the night and suffering from a pure brain block. I'll just write one question. After thats been explained to me I'll be able to get the rest.

From past results it its known that approximately 20% of items from a production line are defective. If 2 items are taken at random from the production line find the probability that:

a. neither are defective

b. both are defective

c. only one item is defective

Probability both are defective is the product of probabilities that one is defective, because:

When you take the first product out, it has a 1 in 5 chance of being defective. When you pick out the 2nd one, only one in five of something that happened 1 in 5 times can produce 2 defective products

i.e. P(b) = 0.2 x 0.2 = 0.04

By the same logic, if probability that one is defective is 0.2, probability that one is not defective is 0.8. Therefore probability that neither are defective is the product of the probability of the individual items not being defective.

i.e. P(a)=0.8 x 0.8 = 0.64

As for c, the sum of probabilities must equal 1. Since there are only 3 possible outcomes as we aren't discriminating which item must be defective (both defective, neither defective, one defective and the other not) the probability for c is obtained simply by subtracting the other two probabilities from 1.

i.e. P© = 1-0.68 = 0.32

[Sir Kevin Of Kilsyth]

Ye know I would've stuck my bottom dollar on you being the one that answered that lol. Cheers buddy. Understand it better now. Just needed woke up.

[The Hurricane]

Plus 2 rep points

[Cowden til i die]

Found a pack of Ferrero Rocher that is 4 months out of date. Eat or bin?

[fanny paddery]

Found a pack of Ferrero Rocher that is 4 months out of date. Eat or bin?

eat

[forehead7]

What's the quickest bus to get from East Kilbride bus station to City Centre, anywhere near Central or Queen Street. I have an Orthodontist's appointment at 1230 and could do with being in Uni at 2. The 16/18 will take about an hour, any advance on that?

[Andy Dufresne]

What's the quickest bus to get from East Kilbride bus station to City Centre, anywhere near Central or Queen Street. I have an Orthodontist's appointment at 1230 and could do with being in Uni at 2. The 16/18 will take about an hour, any advance on that?

Get the train.

[Guest The Phoenix]

Get the train.

Aw feck it, hire a stretch limo.

Edit: I guess not.

Edited September 29, 2010 by The Phoenix

[forehead7]

Get the train.

Train's at 25 or 55 past-ish. Dunno if I'll be out before that, it'll probably be running late(the orthodontist). Thanks though.

[Andy Dufresne]

Train's at 25 or 55 past-ish. Dunno if I'll be out before that, it'll probably be running late(the orthodontist). Thanks though.

I wasn't sure of the train times but when i stayed in EK getting the bus into Glasgow took forever and i always got the train.

[Gaz]

Hm Revenue, does anybody work for them on here or know enough about it? Need some personal advice, was looking for that job list we use to have on here which was very handy but it has gone

I used to and still know a fair bit. What's up? PM if you want to.

[bullywee]

Do I take a lift to college and arrive 15 minutes late or get the bus and arrive 25 minutes early. This is a real life problem any help much appreciated xoxox.

if in doubt, patch it altogether.

[Karpaty]

Does anyone know how to work megatrain, and how to actually get a decent deal? There seems to be nothing for Glasgow-London

[Swarley]

Found a pack of Ferrero Rocher that is 4 months out of date. Eat or bin?

Definitely eat. At work we've been eating our way through a pallet (yes a pallet) of Ferrero Rocher extra stock that's about 6 months out of date. We're all fine, no one has keeled over yet.....

[vikingTON]

Does anyone know how to work megatrain, and how to actually get a decent deal? There seems to be nothing for Glasgow-London

I think megatrain runs generally from London to places like Sheffield. You might then have to get a connection from there.

[Cowden til i die]

Definitely eat. At work we've been eating our way through a pallet (yes a pallet) of Ferrero Rocher extra stock that's about 6 months out of date. We're all fine, no one has keeled over yet.....

I can confirm they were amazing. Dark chocolate and coconut were a bit different.

[Mik]

What's this "Ping chat" pish that's all over facebook just now?

[Cowden til i die]

What's this "Ping chat" pish that's all over facebook just now?

I think its basically MSN for your phone. Works on iPhones and Blackberries i think. Seems like a load of pish as you can just send a text using your phone

[Gaz]

I'm going to see the Manics on Saturday night and one of my mates is having to get the last train home (the rest of us are staying in Edinburgh).

Does anyone know roughly what time concerts at the Corn Exchange finish? He'll have to be in the city for about 23:25 at the latest I think.

I know that each concert will be different but a rough idea would be great, thanks.

[doulikefish]

I'm going to see the Manics on Saturday night and one of my mates is having to get the last train home (the rest of us are staying in Edinburgh).

Does anyone know roughly what time concerts at the Corn Exchange finish? He'll have to be in the city for about 23:25 at the latest I think.

I know that each concert will be different but a rough idea would be great, thanks.

is there not a noise pollution law that all concerts finish before 11pm?

(obviously things like hogmany etc are exempt)