Question

Suppose you choose a marble from a bag containing 3 red marbles, 5 white marbles, and 4 blue marbles. You return the first marble to the bag and then choose again. Find P(red and blue)

Answer 1

help me bro

Answer 2

First you need to find the individual probabilities of drawing a red marble and a blue marble.
\[P(red)=\frac{number\ of\ red\ marbles}{toal\ number\ of\ marbles}\]
Can you do that?

Answer 3

yeahhh bruh thanks

Answer 4

What is your result?

Answer 5

7/12

Answer 6

Not really.
\[P(red)=\frac{number\ of\ red\ marbles}{total\ number\ of\ marbles}=\frac{3}{12}\]
Now you need to find the probability of drawing a blue marble which is
\[P(blue)=\frac{number\ of\ blue\ marbles}{total\ number\ of\ marbles}\]
The probability P(red and blue) is given by
\[P(red)\times P(blue)=you\ can\ calculate\]