Tonight's Euromillions result

Guest Sat Mar 26, 2011 1:01 am

All five numbers divisible by three.

6, 12, 21, 27, 33

Your homework is to calculate the mathematical odds of that happening.

Guest Sat Mar 26, 2011 1:40 am

Need more info, Tone. How does the draw work?

Guest Sat Mar 26, 2011 1:41 am

Bert wrote:Need more info, Tone. How does the draw work?

5 balls drawn at random from 50 balls numbered 1-50

Guest Sat Mar 26, 2011 1:55 am

Odds of picking the 5 -
50.49.48.47.46
5.4.3.2

= 1 in 2,118,760

Permutations where all five nos are divisible by 3 - Any five from 16 (3, 6, 9... 45, 48)
16.15.14.13.12
5.4.3.2

= 416 (no, it's 4368, see below)

Odds that all five nos divide by 3

2118760/416 = 1 in 5093.17 or 5092.17/1 should read
2118760/4368 = 1 in 485.06 or 484.06/1

Guest Sat Mar 26, 2011 1:57 am

Numbers might have fucked up, Tone, I'm trying to calculate with ham fists. Couldn't be arsed doing it accurately by long hand Embarassed

Guest Sat Mar 26, 2011 2:06 am

Go again.

First calc is right.
Second calc, missed a value to the tune of 10.5 out which has to involve the "1" of "14" and the "1" of "15" when I typed. Twatting keys...
Third calc, the premise is sound.

So to correct, answer to read 4368, not 416.

End calc, 4368 for 416, value 1 in 485.06 or 484.06/1