doubt

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doubt

 if there is full stock of tennis balls on friday morning i.e 14 tennis balls cans and d stock was  sold out till sunday night then in how many ways could the balls have been sold on each day ?
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Re: doubt

 This problem can be expressed in the similar way to this: V(n,r)=number of ways to distribute r similar balls in n numbered boxes or in this case number of ways in which 3 days can accomodate 14 balls. V(n,r)=C(n-1+r,r)=(3-1+14,14) =16C14=120
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Re: doubt

 This post was updated on . thank you so much :) more problems : 1) an art collector owns 10 paintings by famous artists has to prepare a will , in how many ways can she leave d paintings to her three heirs.
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Re: doubt

 each of the painting can be given to any of the 3 persons so no of ways wud be...3*3*3*3*3*3*3*3*3*3=3^10
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Re: doubt

 This post was updated on . In reply to this post by ankur @Ankur: shouldn't it be V(n,r)=C(n-1+r,r-1)=(3-1+14,14-1) M.A Economics Delhi School of Economics 2013-15 Email Id:sumit.sharmagi@gmail.com
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Re: doubt

 @sumit..i do think the same.
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Re: doubt

 thanks d formula u told is used when we have to select r objects from n categories with arbitrary repeats . d formula given by ankur is used when n things have to be distributed among r people
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Re: doubt

 @maahi..still not agree... M.A Economics Delhi School of Economics 2013-15 Email Id:sumit.sharmagi@gmail.com
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Re: doubt

 @sumit I dnt knw which formula ur talking abt., nd why are you decreasing one.Plz go ovr the internet Im absolutely sure of the formula I have given (Combinations with repetition.)