Question

These marbles are placed in a bag and two

of them are randomly drawn.

What is the probability of drawing two pink
marbles if the first one is NOT placed back
into the bag before the second draw?

Answer 1

Explanation:

1/9

Answer 2

1/15

Explanation:

there are a total of 10 marbles, of which 3 are pink

therefore the probability of selecting pink on first draw is 3/10

after 1st draw, there are now 9 marbles total and 2 are pink so the probability of selecting pink is 2/9

multiply: 3/10 x 2/9 = 6/90 or 1/15 simplified