Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

You are not logged in.

## #1 2012-12-18 01:19:48

jacks
Full Member

Offline

### probability

Two no. are selected from the set

without replacement one by one .

Then the probability that minimum of 2 no. is

## #2 2012-12-18 01:42:16

bobbym

Offline

### Re: probability

Hi jacks;

Fairly simple to just enumerate:

If I draw a six, I have 3 numbers to pick, same for a 5 and a 4. So that is 3 * 3 = 9

If I draw a 3, I have 5 numbers to pick, same with 2 and 1. So 3 * 5 = 15.

Probability is 4 / 5.

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #3 2012-12-18 01:45:39

jacks
Full Member

Offline

### Re: probability

Thanks bobbym

But I did not understand the meaning of minimum of 2 no. is < 4 (whta does it mean)

## #4 2012-12-18 01:57:01

bobbym

Offline

### Re: probability

Say you pick a 6 and then a 4, remember without replacement means no two numbers are the same.

The minimum of a 6 and a 4 is 4. It means the smallest value out of the two numbers picked.

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #5 2012-12-18 02:00:02

jacks
Full Member

Offline

### Re: probability

Thanks bobbym got it

## #6 2012-12-18 02:02:47

bobbym

Offline

### Re: probability

Okay, you are welcome.

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.
{"found_math": false, "script_math_tex": 0, "script_math_asciimath": 0, "math_annotations": 0, "math_alttext": 0, "mathml": 0, "mathjax_tag": 0, "mathjax_inline_tex": 0, "mathjax_display_tex": 0, "mathjax_asciimath": 0, "img_math": 0, "codecogs_latex": 0, "wp_latex": 0, "mimetex.cgi": 0, "/images/math/codecogs": 0, "mathtex.cgi": 0, "katex": 0, "math-container": 0, "wp-katex-eq": 0, "align": 0, "equation": 0, "x-ck12": 0, "texerror": 0, "url": "http://www.mathisfunforum.com/viewtopic.php?pid=244227", "fetch_time": 1397891457000000000, "content_mime_type": "text/html", "warc_filename": "crawl-data/CC-MAIN-2014-15/segments/1397609536300.49/warc/CC-MAIN-20140416005216-00122-ip-10-147-4-33.ec2.internal.warc.gz", "warc_record_offset": 545675284, "warc_record_length": 4016, "token_count": 582, "char_count": 1910, "score": 3.671875, "int_score": 4, "crawl": "CC-MAIN-2014-15", "snapshot_type": "longest", "language": "en", "language_score": 0.9330154657363892, "file_path": "/sailhome/yjruan/project/latent-lm/data/processed/finemath-4plus/finemath-4plus/train-00061-of-00064.parquet"}