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1 . Let $D_1$ and $D_2$ be the results of rolling two normal $6$-sided dice. What is $\Pr((D_1+D_2)\bmod 4 = 0)$?
(a)
$1/5$
(b)
$1/3$
(c)
$1/6$
(d)
$1/4$
(e)
$1/2$