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Hope the forum members can take some more, these have been most enjoyable

An injured child is rushed to hospital by his father, regrettably the child requires some major surgery, however, just before the operation the surgeon states.....

"I am unable to conduct an operation, as this is MY son"

Regards.........Alan

Blackadder: "Allow me to be the first to offer Dr. Johnson my most sincere contrafibularities! I am anaspeptic, frasmotic, even compunctuous to have caused him such pericombobulation."

Looked over again and found your 10 pounds - oly users spent 270 total and the lens cost 250+20 yours = 270 not 270 lens + 20 yours

Hope you did not look too hard.............. it's the way I tell it.. well done.

Blackadder: "Allow me to be the first to offer Dr. Johnson my most sincere contrafibularities! I am anaspeptic, frasmotic, even compunctuous to have caused him such pericombobulation."

Hope the forum members can take some more, these have been most enjoyable

An injured child is rushed to hospital by his father, regrettably the child requires some major surgery, however, just before the operation the surgeon states.....

"I am unable to conduct an operation, as this is MY son"

Regards.........Alan

Most junior doctors are female nowadays, and even among the surgeons there are a lot of women

Most junior doctors are female nowadays, and even among the surgeons there are a lot of women

Roger,

Absolutely right, when I first heard this some years ago, people would automatically assume that a surgeon was male, perhaps perceptions have changed for the better.

Regards...........Alan

Blackadder: "Allow me to be the first to offer Dr. Johnson my most sincere contrafibularities! I am anaspeptic, frasmotic, even compunctuous to have caused him such pericombobulation."

There are two unopened doors, one of which you've chosen. The opened door shows a goat.

The object of the exercise is to win the car
Should you stick to your first choice, or change your mind and swap to the remaining unopened one?

Jim

I feel that I should win the doctorate, as of course my answer was the first correct one for the question as set. Or are we now in the realms of the 'A' level exam board?.

Nick

Nick Temple-Fry

Medicine as a science ranks somewhere between archaeology and economics.

You should definitely change to the unopened door to increase your chance.

Seems counter-intuitive, but the probability is quite clear.

Martin

Could you explain how the probability doubles please? I don't see it.

No doors reveled and at the start you have a 1:3 probability - regardless of which door you choose.

Choose any door, then one other door revealed, you then have a 1:2 probability - regardless of which door you chose.

Why does it improve the odds if you swap...? You have a 1:2 chance regardless of which remaining door you choose to open. Choose to remain with the one you started with and the chances are 1:2, choose the remaining door you didn't choose initially and the chances are 1:2

Yes, you started with 1:3, but you do not have to swap your choice to get to 1:2 - as soon as the other door is revealed you then have 1:2 with or without swapping.

So how does it double your chances...? to me they are the same either way.

Could you explain how the probability doubles please? I don't see it.

No doors reveled and at the start you have a 1:3 probability - regardless of which door you choose.

I'm no maths genius either, if I were to hazzard a guess, I would say..

1. The door change was offered to you when Monty Hall realised you were going to pick the wrong one... kind of leading you.

2. Or, the odds are not set on you winning at 1:3, but against you losing at 2:3.......in other word there is more chance of getting it wrong than getting it right.

3. If the prize car was a Ford, oil would undoubtedly be leaking under the door, and thus choose the two instead.

4. If it was set in Mongolia for eg: then a goat would be the better and more useful prize....

Anyhow .......You started it Get another started

Blackadder: "Allow me to be the first to offer Dr. Johnson my most sincere contrafibularities! I am anaspeptic, frasmotic, even compunctuous to have caused him such pericombobulation."

On a table, there are 100 cards. Each of these cards is either red or black. At least one of the cards is red. Given any two of the cards, at least one of them is black. How many of the cards are red...?

Surely it's got to be 1 red... if there was more than 1 red there would be a chance you could pick up both and it states that if you pick up 2 cards at least 1 is black... or am I missing something?

GX7, EP3, 9-18, 14-45, 45-150, 20 1.7, 25 1.4, 45 1.8, FL36 & various OM glass. flickr

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