Question 1203476
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Answer: <font color=red>{3, 4, 6, 8, 11}</font>


Explanation


Start with the universal set U = {3, 4, 5, 6, 7, 8, 9, 10, 11}
Cross off the values 5, 7, 9, and 10. These values are kicked out so we find the complement of {5,7,9,10} i.e. the opposite of this set.
The stuff left over is the final answer <font color=red>{3, 4, 6, 8, 11}</font>


In terms of a venn diagram, draw a rectangle to represent the universal set.
Inside the rectangle is a circle. Let's call it set A.
Set A contains 5, 7, 9, 10.
Outside set A, but inside the rectangle, are the other values 3, 4, 6, 8, 11. 
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