If you roll 1 six sided die 5 times, what is the probability of getting at least 1 even number?
回答 (3)
2017-09-25 2:42 pm
✔ 最佳答案
On the six sides of a die, there are 3 even numbers (2, 4 and 6) and 3 odd numbers (1, 3 and 5).When rolling a die once :
P(even number) = 3/6 = 1/2
P(odd number) = 3/6 = 1/2
When rolling a die 5 times, P(at least 1 even number)
= 1 - P(no even number)
= 1 - P(5 odd numbers)
= 1 - (1/2)^5
= 31/32
2017-09-25 5:04 pm
Easier to think of this as (1 -Probability of all odd numbers) in 5 rolls
1 - (1/2)^5
1 - 1/32
= 31/32
1 - (1/2)^5
1 - 1/32
= 31/32
2017-09-25 2:37 pm
Even numbers on a dice-2,4,6=3 total
Total numbers on a dice=6
Therefore 3/6 chance or 50%
Hope that helps thanks
Sorry,now that I think about it wanszeto is right..
Total numbers on a dice=6
Therefore 3/6 chance or 50%
Hope that helps thanks
Sorry,now that I think about it wanszeto is right..
收錄日期: 2021-04-24 00:44:35
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20170925063510AADGNdC