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So you would proceed as : Let R be the random variable denoting the number of red balls selected Let R1 be the event, the first ball selected is red Let B1 be the event, the first ball selected is blue E(R)=P(R1)E(R+1|R1)+P(B1)E(R|B1), by the Conditional Expectation Theorem Now consider...

Thanks heaps for the response. What is the best way of showing this? Like conditional expectation theorem? I'm just wondering because I need to be able to clearly show correct working for q's such as this in the exam. I can do it by symmetry luike youve said above, but yeah I need to be able to...

Hi I have a coupon collector problem, but instead of the expected number of attempts to get all the different coupons, what's the expected number of a particular coupon in satisfying the above constraint? The actual questions is: There is an urn with a large number of blue and red balls, what...