Jump to content
ChetanaSforum

# SOLVE ME IF U CAN!!!!!!!!

## Recommended Posts

Hi Guys, This question is little bit technical but try it if you can actually i also dnt know the final solution........ "You are Entering the room that contains N people.What is the probability that there is someone in the room whose birthday is on the same day as yours? You can assume that there are no leap years and all years have only 365 days. Also assume that birthday being any day of the year is equally likely"So pls help me if u can solve the puzzle..............

#### Share this post

##### Share on other sites

Hi Guys,

This question is little bit technical but try it if you can actually i also dnt know the final solution........

"You are Entering the room that contains N people.What is the probability that there is someone in the room whose birthday is on the same day as yours? You can assume that there are no leap years and all years have only 365 days. Also assume that birthday being any day of the year is equally likely"

So pls help me if u can solve the puzzle..............

Probability for find some one birthday which is matching with the new entered person birthday is P(A)

but it is very easy to calculate P(A) using P(A')

it p(A)=1-P(A')-----1

p(A')=365!/(365^n*[365-n])-------2using these two formula we can find the probability

Example:

let assume that there is only one person in the room. A new person is entered into the room. then the probability for these two person have same birthday is exactly one(by logically)

By Practically ,

probability is p(A)=1-P(A');

P(A')=365!/{365^2(365-2)!}

= 365!/{365*365*363!}

= 365*364/(365*365)

=364/365

P(A)=1-364/365

so P(A)=1/365 ANS

#### Share this post

##### Share on other sites

The answer would be 1/365.

## Create an account or sign in to comment

You need to be a member in order to leave a comment

## Create an account

Sign up for a new account in our community. It's easy!

Register a new account

## Sign in

Already have an account? Sign in here.

Sign In Now

• GET DAILY JOB ALERTS

Instructions Here

• ### Our picks

• Telecom Trainees
• 0 replies
• Tele Caller
• 0 replies
• Walk-In
• 0 replies
• YALAMANCHILI Walk-In
• 1 reply
• Developers
• 0 replies
×