A bag has 5 red marbles, 6 blue marbles and 4 black marbles. What is the probability of picking a red
marble, replacing it, and then picking another red marble?

Question

A bag has 5 red marbles, 6 blue marbles and 4 black marbles. What is the probability of picking a red 
marble, replacing it, and then picking another red marble?

turingtest · Answer

since the marble chosen is replaced each time, the number of marbles does not change on each trial they are independent. this means you can simply multiply the probabilities of picking a red marble each time to find the probability of picking two red marbles in a row.

anonymous · Answer

well there is a total of 15 marbles in the bag. there are t red marbles so you would have a 5 in 15 chance or 1 in 5 chance of picking a red marble

rock_mit182 · Answer

what about the next one ?

rock_mit182 · Answer

@Bsho1997

anonymous · Answer

it would still be 5/15 because you replaced the marble back.
(sorry i didnt fully read the question) so there for to find the probablity of drawing 2 red marbles ina row you have to multiply the two probablities together giving you a overall probility of 1/9