A pair of fair dice is thrown independently three times. The probability of getting a score of exactly 9 twice is (1) $1 / 729$ (2) $8 / 9$ (3) $8 / 729$ (4) $8 / 243$
A pair of fair dice is thrown independently three times. The probability of getting a score of exactly 9 twice is\\
(1) $1 / 729$\\
(2) $8 / 9$\\
(3) $8 / 729$\\
(4) $8 / 243$