Suppose that the ages of 30% of the teachers of a country
Chapter , Problem 6(choose chapter or problem)
Suppose that the ages of 30% of the teachers of a country are over 50, 20% are between 40 and 50, and 50% are below 40. In a random committee of 10 teachers from this country, two are above 50. What is the probability mass function of those who are below 40?
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