SOLUTION: AN URN CONTAINS 5 YELLOW , 12 BLACK , AND 3 WHITE MARBLES. iF ONE MARBLE IS SELECTED , WHAT IS THE PROBABILITY THAT IT IS BLACK?

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Question 606325: AN URN CONTAINS 5 YELLOW , 12 BLACK , AND 3 WHITE MARBLES. iF ONE MARBLE IS SELECTED , WHAT IS THE PROBABILITY THAT IT IS BLACK?
Found 2 solutions by vksarvepalli, solver91311:
Answer by vksarvepalli(154) (Show Source):
You can put this solution on YOUR website!
Total no. of marbles present in the Urn = 5+12+3 = 20
Now number of favorable cases(getting a black marble) = 12
so if one marble is selected,
the probability that it is black is = 12/20 = 3/5 = 0.6 Ans.

Answer by solver91311(24713) (Show Source):
You can put this solution on YOUR website!

THE PROBABILITY OF AN EVENT IS THE NUMBER OF SUCCESSFUL OUTCOMES DIVIDED BY THE TOTAL NUMBER OF OUTCOMES. 12 BLACK MARBLES IS 12 SUCCESSFUL OUTCOMES. 5 PLUS 12 PLUS 3 IS 20 TOTAL OUTCOMES. ISN'T ALL CAPS ANNOYING? I JUST HATE IT WHEN SOMEONE IS SO LAZY AND RUDE THAT THEY CAN'T TURN THE CAPS LOCK OFF, DON'T YOU?

John

My calculator said it, I believe it, that settles it