Mr Broadway Restaurant

When Mr. and Mrs. Clinton two twin son of Ben and Bill had their tenth anniversary, the festival was held at McDonald's at 202 South Broadway, New York. There were 20 children at the party, including Ben and Bill. Ronald McDonald had made 10 and 10 cheeseburgers and when he has served children, he started with the girl sitting directly left of the bill. Ben was sitting at the right of the bill. Ronald flipped a coin (fair) to decide whether the girl should have a hamburger or a cheeseburger, hamburger head, tail cheeseburger. He repeated this procedure with all 17 other children before serving Ben and last bill. While coming to Ben, he did not need to send more piece because there was no cheese left, only 2 burgers.


Ronald McDonald was very surprised at what happened, so he asked what is the probability of such events. Calculate the probability that Ben and Bill will get the same type of burger as described above. Ronald McDonald grids always the same number of hamburgers and cheeseburgers.

Some sample questions years
6-.6250
10-.7266
256-.9500

Oh, I see:))

You toss a coin until H or T appears 5 times so that the largest possible number of shots is 9 in this case, both need to provided different burgers.

In fact, only when the first eight shots end 44 that this occurs, it will it come down to what is the probability of 8 tosses a coin resulting from 4H (, 4T)?

There are 256 possible outcomes of throwing 8 room (2 to the 8th power).
To learn how these are 44 we just need to find the number of ways to choose among the eight places available for the four seats so that its H 8C4 which is 70.

So 70/256 should be the probability of the last two are different burgers.

It is 186/256 = 93/128 they get the same.