Contents
- 1 What is a 90% chance?
- 2 How many dice must be rolled to have at least a 95% chance of rolling a six?
- 3 What is the probability of rolling at least one 6 on four random dice rolls?
- 4 What is the probability of rolling a 6 after 6 rolls?
- 5 What is the probability of rolling a 6 sided die?
- 6 What’s the average roll on a 2D10 die?
What is a 90% chance?
If you say, informally, that the probability of X (or the probability of not-X) is 90%, all you are saying is that X is extremely likely, (or unlikely).
How many dice must be rolled to have at least a 95% chance of rolling a six?
Plugging in a value of Pr=0.5, give the results n≈3.8, since dice are quantized, this means we’d need to roll four dice. For 95% confidence, Pr=0.95, n≈16.43, so we’d need at least 17 dice.
What is the expected number of times you’ll have to roll a fair 6 sided dice until you get two 6s in a row?
It’s expected that we’ll take, on average, six rolls to get the first six, then another six from that point to get the second six. The expected numer of rolls to get to two sixes is 12.
What is the probability of rolling a 4 on a 6 sided dice?
Two (6-sided) dice roll probability table
| Roll a… | Probability |
|---|---|
| 4 | 3/36 (8.333%) |
| 5 | 4/36 (11.111%) |
| 6 | 5/36 (13.889%) |
| 7 | 6/36 (16.667%) |
What is the probability of rolling at least one 6 on four random dice rolls?
671/1296
The probability of rolling at least one six is therefore 1 − 625/1296 = 671/1296 ≈ .
What is the probability of rolling a 6 after 6 rolls?
a 66.5%
There is a 66.5% chance of it landing on a 6 at least once.
What are the odds of rolling 5 sixes in a row?
1/6
The fact that you just rolled five sixes in a row is only in there to confuse you. The probability of getting a six on your next roll is 1/6. Rolling a six on your next roll does not depend on whatever you rolled before.
How many rolls to have a 90% chance of?
Your chances are equal that the number is now exactly right, or that you have 200 successes more than expected. In the latter case it will take a lot more rolls to change that number either to 0 or 400, and so on. Thanks for contributing an answer to Cross Validated!
What is the probability of rolling a 6 sided die?
For example, after rolling a 6-sided die once, the probability that a 6 has appeared at least one time is now , or 16.66%. However, the probability after rolling a second time is not . A good way to understand this is to imagine 100 players each with a 6-sided die.
What’s the average roll on a 2D10 die?
Rolling 1d10, keeping the highest: average roll of 5.5. Rolling 2d10, keeping the highest: average roll of 7.15. Rolling 3d10, keeping the highest: average roll of 7.975. Rolling 4d10, keeping the highest: average roll of 8.4667.
How many dice do you need to have a 90% probability?
So get it exactly, the best shot you have is rolling 10 dice, and you’re capped at 39%; if you want to get close, the more dice you roll the closer you’ll get. (If you want to get at most a particular distance from the proportion with some probability, you can calculate how many dice you need to roll using the cumulative distribution function .)