SOLUTION: To demonstrate probability, Mrs. McNamara had students draw marbles from a bag which contained 8 green marbles and 12 blue marbles. During the class, the bag was dropped, and 3 gr

Algebra ->  Test -> SOLUTION: To demonstrate probability, Mrs. McNamara had students draw marbles from a bag which contained 8 green marbles and 12 blue marbles. During the class, the bag was dropped, and 3 gr      Log On


   

Question 674277: To demonstrate probability, Mrs. McNamara had students draw marbles from a bag which contained 8 green marbles and 12 blue marbles. During the class, the bag was dropped, and 3 green marbles and 3 blue marbles were lost.
Tell whether the loss of marbles changes the probability of drawing a green marble from the bag. If so, was the probability increased or decreased? Support your answer by calculating the probability for each situation.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi

bag containing 20 marbles: 8 green marbles and 12 blue marbles

draw one

P(green) = 8/20 = 2/5  (28/70)

bag containing 14 marbles: 5 green marbles and 9 blue marbles

draw one

P(green) = 5/14   (25/70)

   25/70 < 28/70

As the fractional amount of green marbles decreases, there is less probability of drawing it