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Given that the two numbers appearing on throwing the two dice are different. Find the probability of the event ‘the sum of numbers on the dice is 4’.

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When dice is thrown, number of observations in the sample space = 6 × 6 = 36 Let A be the event that the sum of the numbers on the dice is 4 and B be the event that the two numbers appearing on throwing the two dice are different.∴ A = {(1, 3), (2, 2), (3, 1)}B=?????????????????????(1, 2)(2,...
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When dice is thrown, number of observations in the sample space = 6 × 6 = 36

Let A be the event that the sum of the numbers on the dice is 4 and B be the event that the two numbers appearing on throwing the two dice are different.
∴ A = {(1, 3), (2, 2), (3, 1)}

B=?????????????????????(1, 2)(2, 1)(3, 1)(4, 1)(5, 1)(6, 1)(1, 3)(2, 3)(3, 2)(4, 2)(5, 2)(6, 2)(1, 4)(2, 4)(3, 4)(4, 3)(5, 3)(6, 3)(1, 5)(2, 5)(3, 5)(4, 5)(5, 4)(6, 4)(1, 6)(2, 6)(3, 6)(4, 6)(5,6)(6, 5)?????????????????????B=1, 21, 31, 41, 51, 62, 12, 32, 42, 52, 63, 13, 23, 43, 53, 64, 14, 24, 34, 54, 65, 15, 25, 35, 45,66, 16, 26, 36, 46, 5

AB = {(1, 3), (3, 1)}A∩B = 1, 3, 3, 1

∴ P(B) = 3036=563036=56 and P(AB) = 236=118PA∩B = 236=118

Let P (A|B) represent the probability that the sum of the numbers on the dice is 4, given that the two numbers appearing on throwing the two dice are different.


Therefore, the required probability is .

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