Variation of coupon collector's problem? [closed]












-2














If I have n coupons to collect and I buy only 2n boxes, how many distinct types of coupons can I expect to have?






probability expected-value coupon-collector







share|cite|improve this question













closed as off-topic by max_zorn, José Carlos Santos, Christopher, Davide Giraudo, Rebellos Nov 29 '18 at 12:04


This question appears to be off-topic. The users who voted to close gave this specific reason:


  • "This question is missing context or other details: Please improve the question by providing additional context, which ideally includes your thoughts on the problem and any attempts you have made to solve it. This information helps others identify where you have difficulties and helps them write answers appropriate to your experience level." – max_zorn, José Carlos Santos, Christopher, Davide Giraudo, Rebellos

If this question can be reworded to fit the rules in the help center, please edit the question.


















    -2














    If I have n coupons to collect and I buy only 2n boxes, how many distinct types of coupons can I expect to have?






    probability expected-value coupon-collector







    share|cite|improve this question













    closed as off-topic by max_zorn, José Carlos Santos, Christopher, Davide Giraudo, Rebellos Nov 29 '18 at 12:04


    This question appears to be off-topic. The users who voted to close gave this specific reason:


    • "This question is missing context or other details: Please improve the question by providing additional context, which ideally includes your thoughts on the problem and any attempts you have made to solve it. This information helps others identify where you have difficulties and helps them write answers appropriate to your experience level." – max_zorn, José Carlos Santos, Christopher, Davide Giraudo, Rebellos

    If this question can be reworded to fit the rules in the help center, please edit the question.
















      -2












      -2








      -2


      1





      If I have n coupons to collect and I buy only 2n boxes, how many distinct types of coupons can I expect to have?






      probability expected-value coupon-collector







      share|cite|improve this question













      If I have n coupons to collect and I buy only 2n boxes, how many distinct types of coupons can I expect to have?






      probability expected-value coupon-collector




      probability expected-value coupon-collector






      share|cite|improve this question













      share|cite|improve this question











      share|cite|improve this question




      share|cite|improve this question










      asked Nov 29 '18 at 2:20









      Justin Dee

      615




      615




      closed as off-topic by max_zorn, José Carlos Santos, Christopher, Davide Giraudo, Rebellos Nov 29 '18 at 12:04


      This question appears to be off-topic. The users who voted to close gave this specific reason:


      • "This question is missing context or other details: Please improve the question by providing additional context, which ideally includes your thoughts on the problem and any attempts you have made to solve it. This information helps others identify where you have difficulties and helps them write answers appropriate to your experience level." – max_zorn, José Carlos Santos, Christopher, Davide Giraudo, Rebellos

      If this question can be reworded to fit the rules in the help center, please edit the question.




      closed as off-topic by max_zorn, José Carlos Santos, Christopher, Davide Giraudo, Rebellos Nov 29 '18 at 12:04


      This question appears to be off-topic. The users who voted to close gave this specific reason:


      • "This question is missing context or other details: Please improve the question by providing additional context, which ideally includes your thoughts on the problem and any attempts you have made to solve it. This information helps others identify where you have difficulties and helps them write answers appropriate to your experience level." – max_zorn, José Carlos Santos, Christopher, Davide Giraudo, Rebellos

      If this question can be reworded to fit the rules in the help center, please edit the question.






















          1 Answer
          1






          active

          oldest

          votes


















          2














          Hint:



          For $i=1,dots,n$ let $X_i$ be a random variable whose value is $1$ if coupon $i$ is among the coupons you find and $0$ if it is not. Then you are looking for $E(X_1+X_2+cdots+X_n)$






          share|cite|improve this answer






























            1 Answer
            1






            active

            oldest

            votes








            1 Answer
            1






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes









            2














            Hint:



            For $i=1,dots,n$ let $X_i$ be a random variable whose value is $1$ if coupon $i$ is among the coupons you find and $0$ if it is not. Then you are looking for $E(X_1+X_2+cdots+X_n)$






            share|cite|improve this answer




























              2














              Hint:



              For $i=1,dots,n$ let $X_i$ be a random variable whose value is $1$ if coupon $i$ is among the coupons you find and $0$ if it is not. Then you are looking for $E(X_1+X_2+cdots+X_n)$






              share|cite|improve this answer


























                2












                2








                2






                Hint:



                For $i=1,dots,n$ let $X_i$ be a random variable whose value is $1$ if coupon $i$ is among the coupons you find and $0$ if it is not. Then you are looking for $E(X_1+X_2+cdots+X_n)$






                share|cite|improve this answer














                Hint:



                For $i=1,dots,n$ let $X_i$ be a random variable whose value is $1$ if coupon $i$ is among the coupons you find and $0$ if it is not. Then you are looking for $E(X_1+X_2+cdots+X_n)$







                share|cite|improve this answer














                share|cite|improve this answer



                share|cite|improve this answer








                edited Nov 29 '18 at 16:02

























                answered Nov 29 '18 at 3:01









                saulspatz

                14k21329




                14k21329















                    -

                    Popular posts from this blog

                    Probability when a professor distributes a quiz and homework assignment to a class of n students.

                    Image
                    0 0 $begingroup$ Need help with this problem. Suppose our lazy professor collects a quiz and a homework assignment from a class of n students one day, then distributes both the quizzes and the homework assignments back to the class in a random fashion for grading. Each student receives one quiz and one homework assignment to grade. (a) What is the probability that every student receives someone else's quiz to grade, and someone else's homework to grade? (b) What is the probability that no student receives both their own quiz and their own homework assignment to grade? In this case, some students may receive their own quiz, and others may receive their own homework assignment. (c) Compute the limiting probability as n approaches infinity in each case. ...
                    Read more

                    Aardman Animations

                    Image
                    Aardman Animations, Ltd. Aardman Animations Tipo privada Atividade Animação em stop-motion , Animação em CGI Fundação 1972 Fundador(es) Peter Lord David Sproxton Sede Bristol, Inglaterra  Reino Unido Proprietário(s) Dreamworks Pessoas-chave Peter Lord David Sproxton Nick Park Divisões Aardman Features Aardman Digital Aardman Commercials Aardman Broadcast Aardman International Aardman Rights Aardman Effects Aardman 3-D Systems Aardman Nathan Love AardBoiled Website oficial aardman.com ...
                    Read more

                    Are they similar matrix

                    Image
                    0 $begingroup$ Do $begin{bmatrix} 0&i&0\0&0&1\0&0&0 end{bmatrix} $ and $begin{bmatrix} 0&0&0\-i&0&0\0&1&0 end{bmatrix} $ are similar.Is this True/false Clearly both are nilpotent and one is conjucate transpose of other but how to know if they are similar.i'm stuck. Please help me linear-algebra vector-spaces eigenvalues-eigenvectors generalizedeigenvector share | cite | improve this question edited Dec 10 '18 at 6:38 Vasanth Kris asked Dec 10 '18 at 6:19 ...
                    Read more