Question

Suppose you choose a marble from a bag containing 3 red marbles, 3 white

marbles, and 5 blue marbles. You return the first marble to the bag and then
choose again. Find Pred then blue).

Answer 1

P(red then blue) is
`(15)/(121)`

Explanation:

Number of red marbles = 3

Number of white marbles = 3

Number of blue marbles = 5

Total number of marbles = 3+3+5=11

We are given that You return the first marble to the bag and then choose again.

We are supposed to find the P(red then blue).

Probability of drawing red marble =
`(3)/(11)`

You return the ball

So,Probability of drawing blue marble =
`(5)/(11)`

So,P(Red then blue)=
`(3)/(11) * (5)/(11)=(15)/(121)`

Hence P(red then blue) is
`(15)/(121)`