SOLUTION: Two tetrahedral dice, with faces labelled 1, 2, 3, 4 are thrown and the number on which each lands is noted. The score is the sum of these two numbers. Find the probability that:

Algebra ->  Probability-and-statistics -> SOLUTION: Two tetrahedral dice, with faces labelled 1, 2, 3, 4 are thrown and the number on which each lands is noted. The score is the sum of these two numbers. Find the probability that:       Log On


   

Question 354093: Two tetrahedral dice, with faces labelled 1, 2, 3, 4 are thrown and the number on which each lands is noted. The score is the sum of these two numbers. Find the probability that:
- the score is even, goven that at least one die lands on a 3
- at least one die lands on a 3, given that the score is even
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
a)
3+1=4, 3+2=5, 3+3=6, 3+4=7
Probability that score is even=1/2
.
b)
1+1, 1+3, 3+1, 2+2, 2+4, 4+2, 3+3, 4+4.
3/8 probability that at least one die lands on a 3, given that the score is even.
.
Ed