math 157
posted by Rmz .
Consider the experiment involving rolling a single die once.
What is P(even and Prime)?
I do not know how to start this can anyone help?

math 157 
Marth
Which possibilities are both even and prime? Divide that by 6, the number of possibilities for a standard die.

math 157 
Rmz
Would they both be 1/2?

math 157 
Marth
P(even and prime) means the probability of rolling a single number that is BOTH even and prime. You found P(even) and P(prime) separately.

math 157 
Rmz
so, because there are the same amount of even and odds wouldnt that make it a 1?

math 157 
Marth
The only number that is both even and prime is 2. That is 1 possibility out of 6.

math 157 
Rmz
Oh.... I understand and see that now.
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