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Directions : An urn contains some balls colored white, blue and green. The probability of choosing a white ball is 4/15 and the probability of choosing a green ball is 2/5. There are 10 blue balls.
What is the total number of balls in the urn?
45
34
40
30
Probability of choosing one blue ball is 1/3 And total blue balls are 10. So with 10/30 we get probability as 1/3 So total balls must be 30
Hence, option 4 is the correct answer.
By: Amit Kumar ProfileResourcesReport error
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