Effectively zero. Because between log₂(1/x) being undefined (x=0) or 0(x=1) you will certainly pick a number not a (negative) power of 2 because there are so much more.
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Two digits are selected at random from digits 1 through 9. If sum is even, find the probability that both numbers are odd?
There are 12 boys and 9 girls in a class. If three students are selected at random, what is the probability that 1 girl and 2 boys are selected?
A bag contain 5 blue and 4 black balls. Three balls are drawn at random. What is the probability that 2 are blue and 1 is black.
