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OpenStudy (anonymous):
hallow glass cylinder filled with 10 diff colour balls radious of each equal to radious of cylinder. no.of ways in which white,black,red balls are never together. guess??
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OpenStudy (kc_kennylau):
Where are you from? :) Welcome to OpenStudy btw :D
OpenStudy (anonymous):
hello.. im from india
OpenStudy (kc_kennylau):
@phi idk how to do :/
OpenStudy (phi):
Here is what I came up with. There may be a shorter way to the solution, but I don't know it.
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