Comments on: The Birthday Paradox

By: Alisher

Alisher — Fri, 06 Jan 2012 09:40:15 +0000

CO absorbs at 2.143 × 105 m-1 which is similar to the absorption of NO+ ion. Can yougive any reason for this similarity?

By: Alisher

Alisher — Fri, 06 Jan 2012 09:12:45 +0000

An infinite sequence of independent trials is to be performed. Each trial results in a
success with probability p and a failure with probability 1 – p. What is the probability
that
i) At least 1 success occurs in the first n trials;
ii) Exactly k successes occur in the first n trials;
iii) All trials result in successes? (5)

Q4. (a) The probability mass function of a random variable X is given by
p(X = i) = cli i!, i = 0,1, 2,…, where l is some positive value. Find
i) P (X = 0);
ii) P (X > 2).

By: Alisher

Alisher — Fri, 06 Jan 2012 09:09:51 +0000

If n people are present in a room, what is the probability that no two of them celebrate
their birthday on the same day of the year? How large need n be so that this
probability is less than ½?

By: palmski

palmski — Fri, 25 Mar 2011 12:36:30 +0000

My birthdays 24th Feb too … rubbish with maths but there seems to be alot of Feb birthdays in here. Which begs the question .. what are the percentages of a person being a Pisces more likely to look into something like this?

By: Elemel

Elemel — Mon, 21 Feb 2011 19:05:26 +0000

I came across this site today on 21st Feb. It seems that (sourced soley from this article) a lot of people with birthdays in February are into maths – did you know that Einstein was born on 22nd Feb (so was I incidentally) – so what about the probability of a link between maths geniuses and people born in February? ;)

By: davisjm777

davisjm777 — Wed, 08 Sep 2010 17:55:52 +0000

You also have to decipher the difference in percentage of men that have babies a year compared to the women that have babies…. quite complex math.

By: 1972

1972 — Thu, 04 Feb 2010 04:25:06 +0000

don’t do this very much, but i actually had to chime in, my father was born 10-29-1949 and i was born 10-29-1972, how odd is that? what is the probability of this? i,ve never met anyone else with father/son bday thing, so any advice on figuring this out or website etc etc would be appreciated
i was reading saliu.com but i thought my brain was gonna crash
btw mom was born july 19 and sis was april 11ish(i know i’m a horrrrrrrible bro.)

By: Alucin Veritas

Alucin Veritas — Mon, 28 Dec 2009 01:16:57 +0000

I share my Birthday with my Grandmother. How’s that for coincidence? To one up myself, I know two people with the April First birthday, and they’re the same age and opposite gender.

Math is not convoluted, twisted, or other wise trying to control us. These seemingly counter-intuitive properties found in math seem counter to intuition only because common intuition is flawed.

By: Rodger Wrighthead

Rodger Wrighthead — Mon, 17 Aug 2009 09:43:06 +0000

sradz113, I hate to point it out to you but there is absolutely no point to both of your comments. No one cares. (my comment is purely caring about you, not your comments. I think the appropriate way to finish this up in a way that you understand is “ahahahahaha” and “Burn, Pregnant Dog”).

My birthday falls on the 19th of September and I actually know someone in my own town that has the same birthday. Guess we beat the odds…

By: sradz113

sradz113 — Thu, 18 Jun 2009 14:50:04 +0000

and btw, this site doesn’t work with google chrome, that needs to be assessed.