Question for you math geniouses

[Gwen]

So my angelfish are breeding. Now the cool thing is this is my second breeding pair.

Now for the question.

With 4 fish you have an 87% chance of having 1 breeding pair. Now what were the odds that I go 2 breeding pairs?

[ddunit]

7569 out of 1000.

75.69% ;d

[Adulese Games]

Damn you for posting before I saw the topic. Yeah, if Melley's reading the way I'm reading the question, we're right.

- Adulese

[Gwen]

HowHHis did you get that figure?

[Robin]

He just knocked the decimal spot back a couple of places. ;D

[balliztik1]

If by breeding pair, you mean 1 exclusive male and female, then the chances are significantly less. Assuming a 50-50 chance of each fish being male or female, the combinations break down like so:

MMMM
MMMF
MMFM
MFMM
FMMM
MMFF
MFMF
MFFM
FMMF
FMFM
FFMM
MFFF
FMFF
FFMF
FFFM
FFFF

16 combinations. 14 of 16 have 1 pair, thus an 87.5% chance of having one breeding pair. However, only 6 of the 16 have 2 pairs, which is 37.5%.

Of course, I have no idea how fish breeding patterns work, so with that info, combinations aren't really important. If this is true, however, then there you go.

[Adulese Games]

Yeah, could we get a break down of the number of fish you have and their genders? ;D

- Adulese

[Gwen]

Well I think balie is on the right track.

There is no way to tell the gender thats why I'm trying to figure out what the odds are.

I have 4 fish total. A few reports say that with 4 fish you have an 87.3% chance of having at least 1 male and one female.

Of course 1 fish is a 50% chance of either sex.

Out of my 4 fish I know 100% that I got a male and female. They already had babies.

So now I have 2 fish unnown. They just laid eggs so now I fairly sure they were m and f but possibly f and f

So if 4 fish gave 87% of 1 m and 1 f
what % would 4 fish giving 2 m and 2 f

Does that make more sence?

[balliztik1]

37.5% for 2 of each, yes. :)