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1 . Let

D_{1}, \dots, D_{5}

be the results of rolling five normal

6

-sided dice and let

X = D_{1} + D_{2} + D_{3} + D_{4} + D_{5}

. What is

Pr (X mod 4 = 0)

(a)

1 / 6

(b)

1 / 3

(c)

1 / 2

(d)

1 / 5

(e)

1 / 4