Birthdays Feature.

[Dave]

(Dont read this if you don't like a bit of Maths!)

I've been quite suprised to notice that someone has had a birthday everyday i've logged into this bulletin board. Which made me wonder what would the probability of two or more people having there birthday on the same day! (I hope theres space to put two names there, Jon!) I think you'll agree the result is quite suprising:

Now, For one person, there are 365 distinct possible birthdays.
Then, for two people, there is 364 birthdays she/he could have without matching the first's birthday.
If there is no match after two people, the third person has 363 different birthdays that do not match the other two. So, the probability of a match is 1 - [(365)x(364)x(363)]/[(365)x(365)x(365)].

So, The formula for calculating the probability of a match with n birthdays is 1 - [(365)(364)(363)...(365 - n + 1)]/(365)^n.

This looks a bit boring, but lets put in a number...
If 5 people use the B.B. the chance of two people having the same birthday is remote.
But if 25 use the B.B. The probability is OVER 50%
If 45 use the B.B. The probability is OVER 90%

If 100 of us use the B.B. the odds are more than three million to one on that two share a birthday!

I suspect any Gamblers amongst us could use this to win some money of unsuspecting friends!:eek:

Dave

[topgear]

You've been at university FAR too long mate!

:D

[Dave]

yeah, sorry about that!
Dave

[Maria]

But let's take the opportunity to wish MaestroMatt a belated happy birthday for yesterday, and RDGelder a happy birthday for today. Finally at the age where you can drive your Maestro :)

[D87 SMW]

I'm afraid I will have to wait another year and a half before I can drive my gorgeous Maestro. :(

[Austin-Rover]

Yes, my 17th birthday today!!! I had my first driving lesson too - in a very nice Volkswagen Golf. I must say that driving on the road in rush hour traffic is alot more nerve wrecking than Sunday mornings on ASDA carpark!!!!!


:)

Richard

[D87 SMW]

Sunday mornings at a car park is how I leaned to drive in my Dads 1.6 LX! :laugh:

[Austin-Rover]

I finally managed to get the car started today, so hopefully tomorrow i will be able to drive it for the first time! I can't believe i've had it over a week and not even drove it yet!

[D87 SMW]

Hopefully, F170 GGT is to be driven from the garage to my house on Sunday.
A= Clean it and check the gearbox mountings.
B= To take lots of nice photos.

[D87 SMW]

Just got back now from waxing F170 GGT's bodywork and using bumper black on the door window surrounds. Looks very nice indeed!
I also took a few more photos too! :laugh:

[topgear]

Its my birthday tomorrow!! :-)

I thought id do a pararchute jump with a difference and take the maestro up there with me!

Whos up for some serious photographic oportunites and more than likely a real deal restoration project post jump!?? :eek:

[Maria]

Happy birthday :)

I presume you were kidding about your parachute jump! :D:eek:

Having said that, the Maestro might even enjoy it - our race car's certainly not scared of heights :laugh:

[topgear]

Thank you! :) :) :)

Well, what would you say if i told you i had done that parachute jump, and now have lots of spares from a VDP for you all? :o

hehe, no.. of course i was joking. i wouldnt do that. would love to do a parachute jump minus the car though! Bring it on!!!:cool: