Two negatives equal a positive, so its just like subtracting 50 and 30, but your answer will be a positive.
20/3 - Take the 6 2/3, multiply the 6 and the 3 (6 x 3 = 18), then add the 2 (18 + 2 = 20). Put that number over the original 3 and you've got yourself a mixed number.
Answer:
you are only rolling 1 dice the probability of getting 9 is 0 there are only 6 sides to one die
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