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a sibling pair

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by sanju09 » Wed Apr 08, 2009 5:29 am
A certain junior class has 1000 students and a certain senior class has 800 students. Among these students, there are 60 siblings pairs each consisting of 1 junior and 1 senior. If 1 student is to be selected at random from each class, what is the probability that the 2 students selected will be a sibling pair?
A. 3/40000
B. 1/3600
C. 9/2000
D. 1/60
E. 1/15


OA A
Last edited by sanju09 on Wed Apr 08, 2009 5:48 am, edited 1 time in total.
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by sacx » Wed Apr 08, 2009 5:42 am
https://www.beatthegmat.com/probability- ... 18767.html
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