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Mathematics 7 Online
OpenStudy (lgbasallote):

LGBARIDDLE what is the probability to win a lottery where you can pick 5 numbers out of 100?

OpenStudy (anonymous):

\[\frac{1}{100*99*98*97*96}?\]

OpenStudy (lgbasallote):

i assume that the lack of replies here mean that you agree with the @completeidiot ?

OpenStudy (anonymous):

I DONT KNOW, IM BAD WITH PROBABILITIES

OpenStudy (anonymous):

100C5 combination, right?

OpenStudy (anonymous):

Do partial matches count? i.e. Will I win any prize money if I guess 4 out of the 5 numbers?

OpenStudy (lgbasallote):

the whole thing

OpenStudy (anonymous):

Can numbers repeat? e.g. is it possible for 40,40,40,40,40 to be a winning combination?

OpenStudy (lgbasallote):

what do you think? can it?

OpenStudy (anonymous):

I don't see why not, but it depends on how this particular lottery commission draws the winning numbers.

OpenStudy (lgbasallote):

mathematicians love making things complicated, don't they?

OpenStudy (anonymous):

You bet! If allow repeats, then I'll go with (1/100)^5

OpenStudy (anonymous):

either you win or you lose 100% or 0%

OpenStudy (anonymous):

LOL, Can't calculate probabilities after the fact.

OpenStudy (lgbasallote):

"safe answers" not allowed

OpenStudy (anonymous):

Is there a riddlish trick to this? Are there 100 numbers to choose from, or do I choose 5 numbers from the set {1,0,0}?

OpenStudy (lgbasallote):

again, you're making things too complicated

OpenStudy (anonymous):

Safe answers aren't allowed. ;-)

OpenStudy (anonymous):

0%, its rigged

OpenStudy (anonymous):

in this lottery are there allowed to be repeats of numbers?

OpenStudy (lgbasallote):

what do you think?

OpenStudy (anonymous):

i would hope so, otherwise it would make this question too hard for 2 am :P

OpenStudy (lgbasallote):

this is a real lottery

OpenStudy (lgbasallote):

..scenario

OpenStudy (anonymous):

If repeats, then (1/100)^5, if no repeats, then I agree with completeidiot's first response.

OpenStudy (lgbasallote):

again.. "safe answers" not allowed

OpenStudy (lgbasallote):

pick one

OpenStudy (anonymous):

Then you need to provide more information.

OpenStudy (lgbasallote):

you think of me as too deceitful

hartnn (hartnn):

probability = 1/(total number of people buying that lottery)

OpenStudy (lgbasallote):

@hartnn is it not possible that no one wins the lottery

OpenStudy (anonymous):

@hartnn what if nobody gets the right numbers?

OpenStudy (anonymous):

RIGGGEDDDDDDD

OpenStudy (lgbasallote):

there's no subliminal tricks this time

OpenStudy (lgbasallote):

there're*

OpenStudy (anonymous):

ok have fun y'all im going to sleep

hartnn (hartnn):

so its math only ?

OpenStudy (lgbasallote):

a pinch of liberal arts and discrete mathematics too

OpenStudy (anonymous):

Not enough information: Is this the style of a big, state-wide, balls get drawn out of big drum style lottery, or is this more like a scratch-off ticket?

hartnn (hartnn):

oh,God, i don't even know l of liberal arts .... :(

OpenStudy (lgbasallote):

there are 5 numbers out of 100 in a scratch off lottery ticket?

OpenStudy (anonymous):

There could be.

OpenStudy (lgbasallote):

interesting

OpenStudy (anonymous):

Imagine a 10 by 10 grid whereon any number between 1 and 100 could be under each scratch-off square.

OpenStudy (lgbasallote):

i bet you're a mathematician

OpenStudy (lgbasallote):

that's the third time you made this too complicated

OpenStudy (anonymous):

Then simplify it for me.

OpenStudy (anonymous):

I'm not a mathematician per se, but I do earn a living teaching math and science (and occasionally liberal arts..)

OpenStudy (lgbasallote):

there is a lottery. you pick 5 numbers out of 100. then, being a math nerd, you come home and calculate your chances of winning the lottery

OpenStudy (anonymous):

Yep, and that's why I don't play the lottery. :-)

OpenStudy (lgbasallote):

it's a rip-off scam by the government. just like casino owners

OpenStudy (anonymous):

I call it a tax on people who are bad at math.

OpenStudy (anonymous):

Here is my final answer, 'the probability is very small.'

OpenStudy (lgbasallote):

the answer...is an expression..not a sentence

OpenStudy (lgbasallote):

a MATH expression

OpenStudy (anonymous):

\[P(win) = \lim_{x \rightarrow smallnumber} x\]

OpenStudy (lgbasallote):

the answer is a serious one

OpenStudy (anonymous):

Now I'm going to go drink some hot cocoa and continue reading my David Deutsch book. Good night.

OpenStudy (lgbasallote):

au revoir

OpenStudy (anonymous):

1 in ~24 million?

OpenStudy (lgbasallote):

where are you getting those figures?

OpenStudy (lgbasallote):

there are no hidden messages..the question is as is

OpenStudy (anonymous):

probability is 5%

OpenStudy (lgbasallote):

we'll have a lot of billionaires if it was that simple

OpenStudy (lgbasallote):

i have to go now so it seems i have to spill the anwer....

OpenStudy (lgbasallote):

\[\huge \frac{1}{100C5}\]

OpenStudy (lgbasallote):

it's combination.. NOT permutation @CliffSedge and @completeidiot

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