Throw 2 dies, the sum of points i, j and probability P (i+j):

2(1/36) 3(1/18) 4(1/12) 5(1/9) 6(5/36) 7(1/6)

8(5/36) 9(1/9) 10(1/12) 11(1/18) 12(1/36)

=> Bell curve symmetric both sides, peak 1/6 (sum 7).

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Throw 2 dies, the sum of points i, j and probability P (i+j):

2(1/36) 3(1/18) 4(1/12) 5(1/9) 6(5/36) 7(1/6)

8(5/36) 9(1/9) 10(1/12) 11(1/18) 12(1/36)

=> Bell curve symmetric both sides, peak 1/6 (sum 7).

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