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Posts: 4959

A computer salesman sells a computer to 16 of his customers. If he

has 8 customers in a day, what is the probability he sells at least 3

computers?

Anyone have any idea how to do this? +k for any help

has 8 customers in a day, what is the probability he sells at least 3

computers?

Anyone have any idea how to do this? +k for any help

I meant what I said, and I said what I meant

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Posts: 8364

i am pretty sure that there is something missing or worded wrong/ambigously

in all seriousness, i read that 3 times, 1st time i thought what the fuck is he on about, read it again and thought, this fuckbag has to be kidding, read it once more and decided calling you a fuckbag wasnt good enough - sick-as-aids

Posts: 678

is that the whole question?

SIP Sarah Burke

Posts: 1140

this, OP your missing information

Posts: 8364

i assume he sells a computer once every 16 customers

so its (via excel) a binomial thingy with p = 1/16, x=3 and tries is 8.

0,00990112 or pretty much 1%.

so its (via excel) a binomial thingy with p = 1/16, x=3 and tries is 8.

0,00990112 or pretty much 1%.

in all seriousness, i read that 3 times, 1st time i thought what the fuck is he on about, read it again and thought, this fuckbag has to be kidding, read it once more and decided calling you a fuckbag wasnt good enough - sick-as-aids

Posts: 1129

the post above mine is probably what you're looking for, the question as it is is unanswerable in it's current state.

Posts: 4959

16% not 16 customers sorry about that

I meant what I said, and I said what I meant

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Posts: 8364

at least means NOT 0,1,2

the cumulative probability of 2 is 0,8774

1 minus that is the probability you want.

the cumulative probability of 2 is 0,8774

1 minus that is the probability you want.

in all seriousness, i read that 3 times, 1st time i thought what the fuck is he on about, read it again and thought, this fuckbag has to be kidding, read it once more and decided calling you a fuckbag wasnt good enough - sick-as-aids

Posts: 2142

multiply 8 by. 16 then divide by 3

they think they're being all cute and shit when they're jerking you meanwhile im thinking "DAMN THAT KINDA HURTS, YOURE DOING IT ALL WRONG. IM NEVER GONNA GET OFF IF THIS CONTINUES..."-Anathema

"You can tell this girl can handle a dick properly. I'd let her touch my penis, unless she is under 18 in that case I wouldn't let her touch my penis. I'd say "no, that's illegal."- HotAssBeatClap

"You can tell this girl can handle a dick properly. I'd let her touch my penis, unless she is under 18 in that case I wouldn't let her touch my penis. I'd say "no, that's illegal."- HotAssBeatClap

Posts: 8364

serious? so the probability of him selling at least one would be 128% or wat?

Posts: 17810

it's probable, more than possible for sure

Jim

No matter how old you are, no matter how bad ass you think you are, if a toddler hands you their ringing toy phone...you answer it.

Posts: 845

In Australia, you dont have to do math in yr 11 and 12. I took full advantage of this. While everyone was in Maths, i was in the McDonalds drive thru line. So i can't help you. But i agree with everyone else. there is information missing. It's stupid.

All the maths you need to know is:

An average lap of the park is 11 minutes.

The lift line is an average of 3 minutes.

The lift takes 6 minutes.

You have 3 hours of skiing, without breaks.

On average, how many park laps can you do?

All the maths you need to know is:

An average lap of the park is 11 minutes.

The lift line is an average of 3 minutes.

The lift takes 6 minutes.

You have 3 hours of skiing, without breaks.

On average, how many park laps can you do?

Posts: 2142

16% of 8 is 1.28. divide 1.28 by 3 and you get 0.426666

they think they're being all cute and shit when they're jerking you meanwhile im thinking "DAMN THAT KINDA HURTS, YOURE DOING IT ALL WRONG. IM NEVER GONNA GET OFF IF THIS CONTINUES..."-Anathema

"You can tell this girl can handle a dick properly. I'd let her touch my penis, unless she is under 18 in that case I wouldn't let her touch my penis. I'd say "no, that's illegal."- HotAssBeatClap

"You can tell this girl can handle a dick properly. I'd let her touch my penis, unless she is under 18 in that case I wouldn't let her touch my penis. I'd say "no, that's illegal."- HotAssBeatClap

Posts: 2025

Probability you sell 0 computer with 8 clients are:

[0,84 x 0,84 x ... repeat 8 times] x 1 possible combinaisons = 1x(0,84)^8 = 0,2479 (24,79%)

Probability you sell 1 computer with 8 clients are:

[0,16 x 0,84 x ... repeat 7 times]x 8 possible combinaisons = 8x0,16x(0,84)^7 = 0,3777 (37,77%)

Probability you sell 2 computer with 8 clients are:

[(0,16)^2 x (0,84)^6] x 28 possible combinaisons = 0.2518 (25,18%)

Probability you sell more then 3 are:

1-(0,2479+0,3777+0,2518) = 0,1226 (12,26%)

**More details:

Possibles combinaisons of selling 0 computer are like (1=computer sold, 0= computer not sold for 1st to last client):

(00000000) (1 possibility)

For 1 computer:

(10000000), (01000000), (00100000), ... (8 possibilities)

For 2 computers (you can do a tree diagram to see it's 7+6+5+4+3+2+1=28 possibilities):

(11000000), (10100000), (10010000), ...

(01100000), (01010000), (01001000), ... (00000011)

So there are 28 ways of selling 2 computers to 8 clients and probabilities it happen are all (0,16^2)x(0,84^6).

There's 28 ways (combinaisons) to compute:

0,16 x 0,16 x 0,84 x 0,84 x 0,84 x 0,84 x...

0,16 x 0,84 x 0,16 x 0,84 x 0,84 x 0,84 x...

0,16 x 0,84 x 0,84 x 0,16 x 0,84 x 0,84 x...

0,84 x 0,84 x 0,84 x 0,16 x 0,16 x 0,84 x...

Those are the 28 ways of selling 2 computers in a day.

Posts: 11983

Math is hard.

Posts: 3146

Utterly pointless...

Posts: 6639

This can be done with the binomial distribution since there are a fixed number of trials, there are two outcomes, the trials are independent and the probability of success is constant from trial to trial.

remember that the first term in that summation is "n choose x" on my calc the button is labeled "nCr". Also I accidentally put 6 choose x on the second line, but calculated it correctly with 8 choose x below, so that should be the correct answer.

Let me know if you are still confused.

remember that the first term in that summation is "n choose x" on my calc the button is labeled "nCr". Also I accidentally put 6 choose x on the second line, but calculated it correctly with 8 choose x below, so that should be the correct answer.

Let me know if you are still confused.

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Posts: 973

couple of people have already posted the answer, but yeah, it's 12.26%.

Posts: 2142

wrong.

they think they're being all cute and shit when they're jerking you meanwhile im thinking "DAMN THAT KINDA HURTS, YOURE DOING IT ALL WRONG. IM NEVER GONNA GET OFF IF THIS CONTINUES..."-Anathema

"You can tell this girl can handle a dick properly. I'd let her touch my penis, unless she is under 18 in that case I wouldn't let her touch my penis. I'd say "no, that's illegal."- HotAssBeatClap

"You can tell this girl can handle a dick properly. I'd let her touch my penis, unless she is under 18 in that case I wouldn't let her touch my penis. I'd say "no, that's illegal."- HotAssBeatClap

Posts: 973

one thing is for certain it aint 42.67%. that's way too high to make any logical sense

plug the values in here and check the last output

Posts: 5115

This. I learned how to do this in Business statistic's, just lolling at everyone else who thinks it's not the whole question.

____________________________________________________________

stay steezy kids

Hi I'm Brandon!

eheath sucks at COD4&MW2 Owned his ass /claim

"it is literally because you touch yourself at night"

-no_steeze (Gator.)

stay steezy kids

Hi I'm Brandon!

eheath sucks at COD4&MW2 Owned his ass /claim

"it is literally because you touch yourself at night"

-no_steeze (Gator.)

Posts: 6639

that is wrong for two reasons. number one because he later stated that the probability is 0.16 not 1/16. The other reason is because he only calculated the binomial probability for X=3 not the cumulative probability for X>2

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Posts: 4959

this was the correct answer.

thanks for the help guys, 10/10 for everyone who helped get it right.

thanks for the help guys, 10/10 for everyone who helped get it right.

I meant what I said, and I said what I meant

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Posts: 11669

stats was the weirdest math i ever took. it was so simple yet gave so many people headaches. alas that knowledge left me immediately after 244

↑↑↓↓← → ← → BA

Posts: 2514

didnt look at the numbers but he is definitely right that its a binomial distribution...so thats enough for me to say hes right seeing as hes obviously taken a prob course before.

vote democrat, its easier than working

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