In a box, there are 9 blue, 6 white and some black stones. A stone is – McqOptions

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1.	In a box, there are 9 blue, 6 white and some black stones. A stone is randomly selected and the probability that the stone is black is Â¼. Find the total number of stones in the box?
A.	15
B.	18
C.	20
D.	24
Answer» D. 24

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