Question

2. Ajar contains 11 green marbles, 6 red marbles, and 9 blue marbles. A marble is selected at random, not replaced, and then a second marble is selected. What is the probabilityselecting a red marble followed by a green marble? A 65/649B224/352C33/337D33/325

Answer 1

In order to find the probability, start by finding the probability of selecting a red marble out of the jar,

`(6)/(11+6+9)=(6)/(26)=(3)/(13)`

then, do the same for selecting a green marble, however, remember that the first marble was not replaced, meaning that at this point there are 5 red marbles in the jar,

`(11)/(11+5+9)=(11)/(25)`

finally, multiply the probabilities,

`(3)/(13)*(11)/(25)=(33)/(325)`

Answer:

The probability of the event is 33/325.