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  • Two dice are thrown. The events A, B and C are as follows: A: getting an even number on the first die. B: getting an odd number on the first die. C: getting the sum of the numbers on the dice ≤ 5. Describe the events (v) A but not C

6.(v)    Two dice are thrown. The events A, B and C are as follows:

            A: getting an even number on the first die.

            B: getting an odd number on the first die. 

            C: getting the sum of the numbers on the dice  \leq 5                                    

            Describe the events                                                                                                           

            (v) A but not C

Answers (1)

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Sample space when two dice are thrown:

S = {(x,y): 1 \leq x,y \leq 6}

A: getting an even number on the first die = {(a,b): a \in {2,4,6} and 1 \leq b \leq 6}

 = {(2, 1), (2,2), (2,3), (2,4), (2,5), (2,6), (4,1), (4,2), (4,3), (4,4), (4,5), (4,6), (6,1), (6,2), (6,3), (6,4), (6,5), (6,6)}

C: getting the sum of the numbers on the dice \leq 5 

The possible sum are 2,3,4,5

C = {(a,b):  2 \leq a + b \leq 5} = {(1, 1), (1,2), (1,3), (1,4), (2,1), (2,2), (2,3), (3,1), (3,2), (4,1)}

(v) A but not C = A - C = {(2,4), (2,5), (2,6), (4,2), (4,3), (4,4), (4,5), (4,6), (6,1), (6,2), (6,3), (6,4), (6,5), (6,6)}

Posted by

HARSH KANKARIA

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