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By mistake, a student who is running a computer program enters with negative signs two of...

By mistake, a student who is running a computer program enters with negative
signs two of the six positive numbers and with positive signs two of the four
negative numbers. If at some stage the program chooses three distinct numbers
from these 10 at random and multiplies them, what is the probability that at that
stage no mistake will occur?

Math   Statistics-And-Probability   
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