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If 55 percent of a group of people have brown hair and 80 percent of the same group do not have red hair, what fraction of those who do not have brown hair have red hair?

 Jan 13, 2020
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Let the number in the group  = 100

 

55 have  brown hair....so  (100 - 55) = 45  do NOT have brown hair

And  80 do not have red hair ...so(100 - 80)  = 20 DO  have red hair

 

So

 

Number who have red hair                                      20             4            

______________________________       =         ____  =     ___ 

Number who do not have brown hair                      45             9

 

 

cool cool cool

 Jan 13, 2020

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