randomly pulling a black marble from the bag are 3:8.   A new drawing of the bag of marbles is being created.  The patterned marbles in the bag above will be coloured in to create black marbles, the number of black marbles would have twice as many in the new drawing and the number of white marbles will stay the same.  The odds in favour of pulling a black marble in the new drawing are  Record your answer in the form a:b

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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A drawing of bag contains 5 white, 3 black, and 3 patterned marbles, as shown below.  The odds in favour of randomly pulling a black marble from the bag are 3:8.

 

A new drawing of the bag of marbles is being created.  The patterned marbles in the bag above will be coloured in to create black marbles, the number of black marbles would have twice as many in the new drawing and the number of white marbles will stay the same. 

The odds in favour of pulling a black marble in the new drawing are 

Record your answer in the form a:b

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