Answer:
Third table.
Step-by-step explanation:
A probabilities is the quotient of the number of favourable outcomes and the total number of possible outcomes. From its definition, we can deduct that the numbers are always positive, and the denominator is always major than the numerator. So, every probability is restricted from 0 to 1, that the range of probabilities results, otherwise, if the number is negative or more than 1, that's not a probabilities.
So, the first and fourth are not a probability distribution because they have negative "probabilities". The second table is not a probability distribution either, because the sum of all is more than 1, which is not possible.
Therefore, the right answer is third table because:
0.6 + 0.05 + 0.05 + 0.3 = 1; and all numbers are positive.
