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Combinatorics

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Rolls Until Snake Eyes

COMBIN-GJBN9H

Simultaneously roll two standard 6-sided dice a total of $n$ times.

What is the minimum value of $n$ such that the chances of getting snake eyes (each die shows a 1) at least once among the $n$ rolls is greater than $50\%$?

A

$n=18$

B

$n=25$

C

$n=29$

D

$n=36$

E

$n=72$