Question
What is the probability of getting each of the following on a roll of two standard number cubes?
P(prime number and is divisible by 3)
My teacher got 5.5%, but I don't see how he got it.
P(prime number and is divisible by 3)
My teacher got 5.5%, but I don't see how he got it.
Answers
R_scott
the only prime number divisible by 3 is 3
there are 2 ways to get three with standard dice ... 1,2 and 2,1
2 ways out of 36 possible outcomes (6 times 6)
2/36 = 1/18 = 0.0555...
... this actually rounds to 5.6%
there are 2 ways to get three with standard dice ... 1,2 and 2,1
2 ways out of 36 possible outcomes (6 times 6)
2/36 = 1/18 = 0.0555...
... this actually rounds to 5.6%