two dice
a. find the odds in favor of the following events:
1 getting a sum of 7
2 getting a sum greater than 3
3 getting a sum that is an even number
b. find the odds against each of the events in part a
There are 36 possibilities with two dice. Either-or probabilities are found by adding the individual probabilities.
1. A sum of seven can be gotten with 2,5; 5,2; 3,4; 4,3; 6,1; or 1,6. That is 6/36 = 1/6
2. Sum greater than three = 1 - sum of 3 or less. Go through the same process.
3. Go through a similar process.
b. Subtract previous answers from 1, except for 2.