Problema Solution
to demonstrate probabilty, 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. is so, was the probability increased or decreased?
Answer provided by our tutors
Before loss
P(green) = 8/(8+12) = 0.40
After loss
P(green) = 5/14 = 0.36
So the probability of drawing a green marble from the bag decreased after loss