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Question
Two dice, one white and one red are rolled together .Find the probability of getting
(iii) a difference of 1
Solution
lf two dice are rolled then the possible outcomes are :
(1, 1), (1, 2), (1, 3), (1, 4), (1, 5), (1, 6)
(2, 1), (2, 2), (2, 3), (2, 4), (2, 5), (2, 6)
(3, 1), (3, 2), (3, 3), (3, 4), (3, 5), (3, 6)
(4, 1), (4, 2), (4, 3), (4, 4), ( 4, 5), ( 4, 6)
(5, 1), (5, 2), (5, 3), (5, 4), (5, 5), (5, 6)
(6, 1), (6, 2), (6, 3), (6, 4), (6, 5), (6, 6)
So the total number of outcomes = 36
a difference of 1
Favorable outcomes for getting a difference 1 are :
(1, 2), (2, 1), (2, 3), (3, 2), (3, 4), (4, 3 ), (4, 5), (5, 4), (5, 6), (6, 5)
So the number of possible outcomes = 10
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