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.
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