Each of 2010 boxes in a line contains one red marble and for `1lekle2010`, the box is the `k^(th)` position also contain `k` white marbles. A child be
Each of 2010 boxes in a line contains one red marble and for `1lekle2010`, the box is the `k^(th)` position also contain `k` white marbles. A child begins at the fist box and successively drawn a single marble at random each box in order. The stops when be fist draws a red marble. Let `p(n)` be the probability that the stops after drawing exactly `n` marbles. The possible value (s) of `n` for which `p(n)lt 1/ 2010` is:
A. 44
B. 45
C. 46
D. 47
4 views
1 Answers
Correct Answer - B::C::D
bcd
`p(n)=` Probability that child stops after drawing exactly `n` marbles
`p(n)=1/2 . 2/3 . 3/4……..((n-1)/n)(1/(n+1))=1/(n(n+1))`
4 views
Answered