SOLUTION: A bag contains five blue marbles, five red marbles, five white marbles, and five black marbles. You draw a marble from the bag, and then draw another marble from the bag.
Do you
Algebra ->
Permutations
-> SOLUTION: A bag contains five blue marbles, five red marbles, five white marbles, and five black marbles. You draw a marble from the bag, and then draw another marble from the bag.
Do you
Log On
Question 446443: A bag contains five blue marbles, five red marbles, five white marbles, and five black marbles. You draw a marble from the bag, and then draw another marble from the bag.
Do you have a greater probability of drawing two blue marbles if you replace the first marble after you draw it or if you don't replace the marble? Answer by ewatrrr(24785) (Show Source):
Hi,
20 marbles in all of which: 5 are blue, 5 are red, 5 are white and 5 are black
Drawing 2 marbles without replacin the 1st blue drawn
P(2 blue) = 5/20*4/19 = 20/380 = 1/19
Drawing 2 marbles with replacement of the first blue one
P(2 blue) = 5/20*5/20 = 25/400 = 1//16
1/16 > 1/19
