in a class one quarter of students have blonde hair and brown eyes and one third have brown eyes and blonde hair what fraction of the class in total have brown eyes
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hmm. isn't "blonde hair and brown eyes" the same as "brown eyes and blonde hair" ?
It is saying that the whole class had either brown eyes or blonde hair. They are saying out of all the blonde haired students, 1/4 have blonde hair AND brown eyes. and it is saying out of all brown eyed students, 1/3 have brown eyes and blonde hair.
2 answers