Expected number of black balls
An urn contains 10 white balls and 20 black balls. You select 5 balls at random without replacement. What is the expected number of black balls in your sample of 5?
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Do more Republicans (group A) then Democrats (group B) favor a bill to make it easier for someone to own a firearm? Two hundred Republicans and two hundred Democrats were asked if they favored a bill that made it easier for someone to own a firear
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Determine the numbers of moles of oxygen are required to react with the 1.6 moles of isopropyl alcohol, C3H7OH? Equation is 2 C3H7OH + 9 O2 --> 6 CO2 + 8 H2O
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