Question

A jar contains 10 red marbles 18 blue marbles and 12 white marbles. Which multiplication will halo you find the sorted probability of picking a red marble, replacing it, then picking a blue marble?

Answer 1

`(9)/(80)`

Explanation:

So there is 40marbles in total

The probability of picking a red marble first is
`(10)/(40)` because there is 10 red marbles out of 40 total marbles

Then you replace it and I'm going to assume that you put the red marble back.

Then you would still have 40 marbles and the probability of picking a blue one is
`(18)/(40)` because there is 18 blue marbles.

Then you multiply
`(10)/(40)` and
`(18)/(40)` and that is
`(9)/(80)`

Hope this helps and If I'm wrong pls tell me.