Select the favorable outcomes for rolling doubles.1. (1-1) (2-2) (3-3) (4-4) (5-5) (6-6)2. (5-1) (5-2) (5-3) (5-4) (5-5) (5-6)3. (1-1) (1-2) (1-3) (2-1) (2-2) (3-1)4. (1-3) (2-3) (3-1) (3-2) (3-4) (3-5) (3-6) (4-3) (5-3) (6-3)

By doubles as outcome means the first and second outcome must be same.The first option has outcome as 1. (1-1) (2-2) (3-3) (4-4) (5-5) (6-6).In this we have first and second outcome as same, so we can say it satisfies our requirement and option first is the correct choice.