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## Math for fun and glory

### Course: Math for fun and glory>Unit 5

Lesson 2: Random sampling warmup

# Introduction to random sampling

Can Sal predict the ratio of white to black balls without looking at all of them? Created by Brit Cruise.

## Want to join the conversation?

• What happens if you do not put the beads back?
• Then eventually the beads will all be out of the cup and there would be no more beads to pick.
• sal said the more trials, the more he will get close to the right path, is that true?
• Yes, the more you pick, the better picture you get of what is inside.
• he says "hello brit" the same way every time
• I am confused what is going since there basically picking balls the whole time and sal is trying to guess the ratio.
(1 vote)
• Is there anyway to predict the ratio of black or white marbles?
(1 vote)
• I think sal is wrong because he said that the more trials the more likely he is going to get it correct, is that true?
• No, he is correct. See the next video. The results in the video were caused by pure chance.
• way do's the video not work?
• It depends if your teacher probably blocked the videos since they are uploaded on youtube. It happens to me to when i use the school computers.
(1 vote)
• He was clearly doing a pattern