Second die First die 1 2 3 4 5 6 1 (1,1) (1,2) (1,3) (1,4) (1,5) (1,6) 2 (2,1) (

Question

                                   Second die

First die

1

2

3

4

5

6

1

(1,1)

(1,2)

(1,3)

(1,4)

(1,5)

(1,6)

2

(2,1)

(2,2)

(2,3)

(2,4)

(2,5)

(2,6)

3

(3,1)

(3,2)

(3,3)

(3,4)

(3,5)

(3,6)

4

(4,1)

(4,2)

(4,3)

(4,4)

(4,5)

(4,6)

5

(5,1)

(5,2)

(5,3)

(5,4)

(5,5)

(5,6)

6

(6,1)

(6,2)

(6,3)

(6,4)

(6,5)

(6,6)

                                   Second die

First die

1

2

3

4

5

6

1

(1,1)

(1,2)

(1,3)

(1,4)

(1,5)

(1,6)

2

(2,1)

(2,2)

(2,3)

(2,4)

(2,5)

(2,6)

3

(3,1)

(3,2)

(3,3)

(3,4)

(3,5)

(3,6)

4

(4,1)

(4,2)

(4,3)

(4,4)

(4,5)

(4,6)

5

(5,1)

(5,2)

(5,3)

(5,4)

(5,5)

(5,6)

6

(6,1)

(6,2)

(6,3)

(6,4)

(6,5)

(6,6)

Explanation / Answer

For getting 6 chances are (1,5);(5,1);(2,4);(4,2);(3,3) For getting 8 chances are (2,6);(6,2);(3,5);(5,3);(4,4) Total no of chances of getting 6 or 8 is=10 Therefore probability of getting 6 or 8=10/36                        ..............36 is total no of outcomes                                                         =0.278 therefore; probability of not getting 6 or 8=1-10/36                                                            =1-0.278                                              =0.722

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