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Mathematics 13 Online
OpenStudy (anonymous):

girls are one-half of the fifth-grade class. Two-tenths of these girls have red hair. red-haired girls are what fraction of the fifth-grade class?

OpenStudy (anonymous):

girls = class / 2 red = 2*girls / 10 = girls / 5 red = (class / 2) / 5 = class / 10... so 1/10 th of the fifth-grade is a ginger.... *rawr* :D

OpenStudy (anonymous):

you could also just go like: 2 tenths of girls a redheads - girls make only half of the class - so half of 2 tenths are redheads... half of 2 tenths is obviously 1 tenth...

OpenStudy (anonymous):

eww and ok rawr like what the freak

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