What are the odds?

**powerman2000** · 01-27-2006, 04:42 AM

If I have a silver dollar and I flip the coin 99 times, and every time it lands on tails, what are the odds that on the 100th coin flip it will land on tails again?

marlon · 01-27-2006, 04:49 AM

is this a trick question like... "THERE IS NO SUCH THING AS A SILVER DOLLAR!"
or the answer would be 50%

**Trick D** · 01-27-2006, 04:49 AM

50% because as long as there is 2 sides, and the weight is displaced evenly (meaning it isn't a trick), then it is still a 50/50 chance...

**bubba g** · 01-27-2006, 05:31 AM

Quote:

Originally Posted by Trick D

50% because as long as there is 2 sides, and the weight is displaced evenly (meaning it isn't a trick), then it is still a 50/50 chance...

Yep.

Now the odds of it landing on tails 99 times in a row... that is another story.. one with a lot of zeros in it.

**Trick D** · 01-27-2006, 03:06 PM

Yep... I think it would be:

1.5 x 10 (-30)

pammiejoe6 · 01-27-2006, 05:48 PM

Quote:

Originally Posted by marlon

is this a trick question like... "THERE IS NO SUCH THING AS A SILVER DOLLAR!"
or the answer would be 50%

bwhahahahahahaaaaa:boink:

**powerman2000** · 01-27-2006, 10:52 PM

I thought for sure that I'd get at least 1 person to argue the odds are not 50/50 on the last coin toss.

You peeps are all too smart!

That's no fun.

The Booger · 01-27-2006, 10:57 PM

Quote:

Originally Posted by marlon

is this a trick question like... "THERE IS NO SUCH THING AS A SILVER DOLLAR!"

"Checks package that came in the mail"

Yup. There are silver dollars.....

**builtbeast** · 01-28-2006, 12:16 AM

Quote:

Originally Posted by powerman2000

If I have a silver dollar and I flip the coin 99 times, and every time it lands on tails, what are the odds that on the 100th coin flip it will land on tails again?

p[100=tails] = 0.5 :lick:

Use the binomial distribution to determine the probability for getting 99 in a row. :rock2:

**Trick D** · 01-28-2006, 03:07 AM

Could you not go .5^99? I think that would give you the same percentage...

01-27-2006, 04:42 AM	#1
powerman2000 The Old Moderator Join Date: Apr 2005 Location: Colorado Posts: 4,188 Recipes: 0 Rep Power: 202	What are the odds? If I have a silver dollar and I flip the coin 99 times, and every time it lands on tails, what are the odds that on the 100th coin flip it will land on tails again? __________________ Don't forget to periodize Best BP 507 lbs competitive Best Squat 705 lbs competitive Best DL 650 lbs competitive Guns don't kill people, men who come home early do. My workout log http://www.ironmass.com/forums/showthread.php?t=6247

01-27-2006, 04:49 AM	#2
marlon Pink Members Join Date: Dec 2005 Posts: 381 Recipes: 0 Rep Power: 6	is this a trick question like... "THERE IS NO SUCH THING AS A SILVER DOLLAR!" or the answer would be 50% __________________ ***********.com 5% off Discount Code: MPP883

01-27-2006, 10:52 PM	#7
powerman2000 The Old Moderator Join Date: Apr 2005 Location: Colorado Posts: 4,188 Recipes: 0 Rep Power: 202	I thought for sure that I'd get at least 1 person to argue the odds are not 50/50 on the last coin toss. You peeps are all too smart! That's no fun. __________________ Don't forget to periodize Best BP 507 lbs competitive Best Squat 705 lbs competitive Best DL 650 lbs competitive Guns don't kill people, men who come home early do. My workout log http://www.ironmass.com/forums/showthread.php?t=6247

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