In three colored urns - white, black and yellow, total 108 balls are p – McqOptions

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1.	In three colored urns - white, black and yellow, total 108 balls are placed. There are twice as many balls in the black and white urns combined as there are in the yellow urn and twice as many in the yellow urn as there are in the white urn. How many balls are there in the black urn?
A.	18
B.	45
C.	81
D.	54
Answer» E.

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