12 ആളുകൾ ചേർന്ന് ഒരു ജോലി 15 ദിവസംകൊണ്ട് തീർക്കും. എന്നാൽ അതേ ജോലി 10 ആളുകൾ എത്ര ദിവസം കൊണ്ട് തീർക്കും?
A18
B20
C25
D27
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