What is the probability of rolling an even number on a six sided die and then rolling a 4?
>>will medal
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OpenStudy (mathgeek289):
Okay. How Man Even Numbers Are There In 1-6?
OpenStudy (mathgeek289):
2, 4, and 6
OpenStudy (mathgeek289):
So, We Have The Probability being 3/6 so far
OpenStudy (mathgeek289):
We Also Know That There Is 1 Four On The Die
OpenStudy (mathgeek289):
So That Is 1/6
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OpenStudy (mathgeek289):
What Do We Do Next?
OpenStudy (tylerballardwildcat):
i dont know
OpenStudy (welshfella):
OK You have 2 events First one has probability 3/6 or 1/2 and the second has probability of 1/6.
How do we calculate the probabilty of both these 2 events happening. What do we do to the 1/2 abd 1/6?
OpenStudy (welshfella):
* and 1/6
OpenStudy (tylerballardwildcat):
divide
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OpenStudy (welshfella):
No
Hint the probability of both happening is a lot less than only one happening.
OpenStudy (tylerballardwildcat):
muliply
OpenStudy (mathgeek289):
Yes
1/6 * 3/6 = ?
OpenStudy (mathgeek289):
1 3
-- * --
6 6
OpenStudy (mathgeek289):
1 * 3 = 3
6 * 6 = 36
So, It Is 3/36 Probability. Simplify.
3 1
-- = ---
36 12