If x is to be selected at random from set T, what is the probability that 1/4x-5<=0?
1) T is a set of 8 integers
2) T is contained in the set of integers from 1 to 25, inclusive.
Regardless of the question, I think the answer should be E.
You can solve for x in the equation above.
I use (1/4)*x - 5 <= 0 => x<=20
So we are trying to find the probability when x<=20. We need to know how many integers in the set + the values of those integers.
1) Don't know any values, INSUFFICIENT
2) If T is contained in the set of 1 to 25, it can be 1-20, 1-5, etc. We don't really know what it is.
Together, we still don't know.