Question

A box contains 6 red marbles, 4 blue marbles, and 8 yellow marbles.

13. Find P(yellow then red) if a marble is selected, and then a second marble
is selected without replacing the first marble.

Answer 1

Explanation:

The total number of marbles is 6 + 8 + 4 = 18]

If the first marble drawn is yellow, that happens with a probability of 8/18

So the important thing to note is that now there are 17 marbles,

Now a red marble is drawn. We didn't replace the yellow.

There are 6 red marbles.

So the chances of getting a red marble is 6/17

Answer. P(Y then R) = 8/18 * 6/17 = 48/306

48 / 306 reduces down to 8/51 = 0.156