Math Help - More probability problems.

1. More probability problems.

Two Dice are rolled: one is red and the other is white.
a) How many outcomes are possible? 6x6(each dice)=36

b) Determine the probability that the sum of the two dice totals anything but seven? I don't know how to approach this one I cant get the answer which is 5/6.

c) Determine the probability that the sum of the two dices totals seven? same thing but the answer is 1/6.

2. your solution to A) is correct.

for B) you can get a 7 by with these values (1,6), (2,5), (3,4), (5,2), (6,1). now each of these outcomes has probability $\frac{1}{36}$, therefore summing them up we get $\frac{6}{36} = \frac{1}{6}$. Now since we want the probability that it's not a 7, which is $1-P(X=7) = 1-\frac{1}{6} = \frac{5}{6}$

for C) it's just the former part of the explanation of B).