What is the probability that we have exactly $ 3 $ aces if we know that the first card is a black ace?

We draw $ 5 $ Cards from the $ 52 $ Card game (no return). What is the probability that we have exactly $ 3 $ Aces when we know that the first card is a black ace?

We have conditional probability in this task. So let:

$ A $ – We have exactly $ 3 $ Aces

$ B $ – The first card is a black ace

Then: $$ P (A | B) = frac {P (A cap B)} {P (B)} = frac {| A cap B |} {| B |} = frac {| A cap B |} { binom21 binom {51} {4}} $$
However, I have a problem with it $ | A cap B | $ because I know that in $ binom21 binom32 binom {48} {2} $ I don't include the order of the draws.

Unity – Black stripes at the intersections of the street segments

I created a simple runner where the road is generated dynamically and the ball moves together with the camera using the rigid body speed. The problem, however, is that black bars appear on the joints between the segments. When you add an AddForce ball, the ball jumps at the joints, which shouldn't be. How to solve this problem

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I checked the positions of the segments, they completely match the ones I wanted, that is, there are no gaps between them, I use the standard shader

Segments 10.4 units in size. Imported from Blender, but if you're using the standard cube model, it's the same (black bars), so that's not the point. Positions between these segments:

The previous segment (where the ball is in the screenshot)

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and the next segment

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Road material settings:

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Well, if you excuse the pun, it's not a black or white problem.

Latino is a cultural rather than a physical term. They can be descended from Spanish explorers and are therefore completely white and Latin American. They can mainly be descended from natives such as Mayans and Aztecs and Incas and others and Latino. They can mostly be descended from Africans and Latino. And of course you can be a mixture of all of these.

Remote desktop – is there a fix for displaying two black screens with TeamViewer under macOS 10.14.6?

We use TeamViewer at work so that employees can work from home. We have a problem that we're tracking with support, and I wanted to share it here if anyone found out.

Macs at work have two displays and the same at home.

  • macOS 10.14.6 on both
  • TeamViewer host 15.4.4445
  • TeamViewer Full Client 15.4.4445

Things work for a while, but at night when the work machine logs off, we see a good chance that a black screen will appear on TeamViewer in the morning. The release notes say this release fixes this issue, but we're not so sure. Since we're removed, it's hard to know what's on the actual screen.

Has anyone dealt with it or a workaround?

Can I travel from Great Britain to the United States with my tarantula (Grammostola pulcher) – Brazillian Black?

It looks like you need to contact U.S. fish and wildlife services to see if your spider is allowed. There is a good chance that this is not the case.

The answer may also vary depending on whether you are visiting the United States temporarily or moving there. (In the latter case, this question fits our sister site Expatriates Stack Exchange better.

Colors – How can Firefox display a standard black screen when a page loads?

I found an answer from http://forums.mozillazine.org/viewtopic.php?p=2989626#p2989626 using http://kb.mozillazine.org/index.php?title=UserChrome.css.

The Mozilla Directory depends on your operating system:

Windows NT (NT4.x / 2000 / XP / Vista / 7/8/10): "%APPDATA%Mozilla"

Windows 95 (without desktop update): C:WindowsMozilla

Windows 95 (with desktop update) / 98 / Me: C:WindowsApplication DataMozilla, C:WindowsProfiles(Windows login/user name)Application DataMozilla

Unix / Linux: ~/.mozilla/

Mac OS X: ~/Library/Mozilla/, ~/Library/Application Support/

After finding the Mozilla Directory You have to go through a few more directories to find your profile directory. See http://kb.mozillazine.org/Profile_folder_-_Firefox.

If it doesn't exist in your profile directory, create that chrome Directory. Then create a new text file in chrome called userChrome.css with the following content:

@namespace url("https://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
browser { background-color: #333 !important; }

You can change the background color as you like. Unfortunately for me the screen still flashes very briefly in white, but this update is still very nice.

Photoshop – how do I achieve this creamy black and white look?

The JW Anderson SS19 campaign video has this unique black and white look (this also applies to photography), and I can't figure out how to replicate it. I'm not sure if it's lighting, a filter, or the way they were edited, but it's a creamy, almost vintage look. How do I replicate this? It looks like a little bit of sepia, but that doesn't give me the full effect I'm aiming for.
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Can you "withdraw" your application to enter the United States without your file being permanently black, even when traveling by air?

I understand that immigration officials, thanks to the uncomfortably lax data protection laws in the United States, can require you to search your phone. If you unlock a fingerprint, they can force you directly, but if it is a passcode, you can refuse it. Of course, if you refuse, you probably won't be admitted. Is it even possible to go back without a permanent black mark in your file? E.g. Repay your own plane tickets and go home without technical refusal? Or do you have to accept the search for your phone if you want to be able to return to the U.S. (or even one of the other Five Eyes)?