This is weird...

[Ashful]

So, in filling out some paperwork, we just realized both my kids were born on a Friday, and so was my wife.

Then we looked at my birth date, and found I was born on a Sunday. So was my only sibling, and my mother.

Statistically, this is impressive. I wonder how often this happens, that all kids in a family / generation are born on the same day of the week as their mother.

edit: I'm no statistician, but I think the likelihood of this happening is (1/7)^3 = 0.29% in one generation. Two generations all on the same day would be the square of that, but I think two generations each on their own day is only 1/2 that.

 

[woodgeek]

The real question is how many questions like that can you ask? Ask enough of them and one will have a weird answer!

both of my kids were born on the same day of the year, 3 years (and 6 time zones) apart.

 

[razerface]

My son and I were born on the same day of the year.

Red Skelton was born on that same day too,,,,I went to the worlds fair in 1964 with mom & dad,,where they had a machine. You entered your birthday and it spit out what famous people were also born on that day.

 

[firefighterjake]

I was born . . . it was on a day of the week. I am pretty sure many other babies were born that same day . . . and I think some folks may have also died on that day. Strange, huh?

 

[Ashful]

My son and I were born on the same day of the year. Red Skelton was born on that same day too,,,,

So were one in seven famous people.

I think my original math was flawed, in that it's 0.29% likely that all three were born on a given day (say Sunday). However, given that you don't care what actual day the first was born on, it's actually just (1/7)^2 = 2% likley. Still, highly unlikely... esp. two generations in a row...

I was born . . . it was on a day of the week. I am pretty sure many other babies were born that same day . . . and I think some folks may have also died on that day. Strange, huh?

Okay, wiseguy... but were you born on the same day as your mother and sibling(s)?

 

[fossil]

Z-z-z-z-z-z-z

 

[Ashful]

I see you are not easily impressed...

 

[johneh]

Ok so you were all born nothing spectacular about that or was there
But try this one My Mother died 01/01/01
My Father died 02/02/02
boy did we watch 03/03/03

 

[firefighterjake]

So were one in seven famous people.

I think my original math was flawed, in that it's 0.29% likely that all three were born on a given day (say Sunday). However, given that you don't care what actual day the first was born on, it's actually just (1/7)^2 = 2% likley. Still, highly unlikely... esp. two generations in a row...


Okay, wiseguy... but were you born on the same day as your mother and sibling(s)?

Nope . . . that would have made my mother my sister and my siblings would have been triplets if we were born on the same day. As for being born on the same day of the week . . . no idea. I just remember being happy to be born and get out of the womb.

 

[guy01]

Nope . . . that would have made my mother my sister and my siblings would have been triplets if we were born on the same day. As for being born on the same day of the week . . . no idea. I just remember being happy to be born and get out of the womb.

Wow you have a very impresive memory!

 

[Adios Pantalones]

The chances are 1/7 ^2, since the first date is fixed. The chance that the second would be born on the same day as the first, is one in seven. Therefore the chances of the third is one in seven squared. two point something percent.

 

[Ashful]

The chances are 1/7 ^2, since the first date is fixed. The chance that the second would be born on the same day as the first, is one in seven. Therefore the chances of the third is one in seven squared. two point something percent.

Yep... already corrected myself in post #5. That's per generation. Then to have it repeat in two consecutive generations... very unlikely.

 

[Adios Pantalones]

Yeah, I don't read so good.

 

[Adios Pantalones]

Yep... already corrected myself in post #5. That's per generation. Then to have it repeat in two consecutive generations... very unlikely.

I believe that the chance it would happen in two generations is one in 49. Is that right?

 

[woodgeek]

The two generation case (on different days) is at least 1/7^4 = 4x10-4. For every person in each group that does not have that birth condition, (like your father and you versus your mother and wife) you should increase the odds by 2 or 4 (if it had been your father rather than your mother, it would be just as weird). That gets you to 1 in 500 or 1000.

 

[hossthehermit]

I was born at night ............ it was dark ......................... couldn't see the calendar, so didn't know what year, month, day it was.................................... snowin' out and wicked cold ........................ figgered it prob'ly weren't August ..........................

 

[Adios Pantalones]

This is as much as philosophical as it is mathematical. If the condition of the first group is predicted, then the odds are worse. If they are not, then it is a similar case to a second child being born on the same day as the first generational person. That was 1/7, not 1/49. However, the chances of a given family having two sets that follow this pattern are clearly much smaller than one in 49.

 

[Warm_in_NH]

To view this content we will need your consent to set third party cookies.
For more detailed information, see our cookies page.

Accept third party cookies

You had to know it was coming....

 

[BrotherBart]

If a train leaves Salt Lake City and a train leaves Atlanta...

 

[tigger]

I joined a golf club and was assigned member number 408.....3 months later my son is born at 4:08 in the morning. Every time I order a beer after a round I think of that morning! I'm taking that picture drinking a beer in an Adirondack chair.....think life is great

 

[bmblank]

Does anybody else reading this thread find that being an engineer ruins a lot of movies?

 

[firefighterjake]

If a train leaves Salt Lake City and a train leaves Atlanta...

Are these freight trains or passenger trains?

 

[fossil]

Crude oil. How long until they're both derailed? Show your work. Neatness counts.

 

[bmblank]

It depends on how many marshmallows you can fit in a doghouse.

 

[ironpony]

Lets see, Joful is an engineer so he might be driving one of the trains, probably passenger. If I remember correctly from a post in another thread Joful referred to himself as ' a semi intelligent engineer, hence he is easily amused.

I actually find number coincidences like this very interesting. I am off to look up all the days of our family and see if there is anything interesting. off the top of my head though son daughter dad 7, 14, 21 day of the month. I'll be back shortly.