a pair of dice is thrown independently three times the probability of getting a score of exactly 9 twice is
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Probability of getting score 9 in a single throw
=4/36
=1/9
Probability of getting score 9 exactly twice
=3C2×(1/9)^2×8/9
=3C2×(1/9)^2×8/9
=8/243
=4/36
=1/9
Probability of getting score 9 exactly twice
=3C2×(1/9)^2×8/9
=3C2×(1/9)^2×8/9
=8/243
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