im not sure how to explain it, but i know its b
We have that the total length of paper needed to cover all the tables is

From the question we are told that:
Number of tables 
Length of table
Extension 
Generally, the equation for the Total length tables is mathematically given by


Therefore with an extension of 0.25ft at both end we have the Total length of tablecloths to be


In conclusion
The total length of paper needed to cover all the tables is

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Answer:
1//12.
Step-by-step explanation:
The possible ways to get a sum of 4 are (1, 3), (3, 1), (2, 2) .
There are a total of 6 * 6 = 36 possible outcomes when 2 dice are rolled.
Thus the probability of the sum being 4 = 3 / 36 = 1/12 (answer).