scurtis895
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white shapes and black shapes are used in a game some of the shapes are circles and all the other shapes are squares. the raito of the number of white shapesto the nuber of black shapes is 5:11 . the ratio of the number of white circles to the number of white squares is 3:7. the ratio of the nuber of black circles to the number of black squares os 3:8. work out what fraction of all shapes are circles help me !!
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old_engineer
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(Original post by scurtis895)
white shapes and black shapes are used in a game some of the shapes are circles and all the other shapes are squares. the raito of the number of white shapesto the nuber of black shapes is 5:11 . the ratio of the number of white circles to the number of white squares is 3:7. the ratio of the nuber of black circles to the number of black squares os 3:8. work out what fraction of all shapes are circles help me !!
It might help you to draw a tree diagram. The first level of the tree is the division between white shapes and black shapes. From the information given, 5/16 of the shapes are white and 11/16 of the shapes are black. You need to continue with the second level of the tree, where both the white and black branches are subdivided into circles and squares.
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klopp
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the answer is 9 over 32
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