Question

*probability question* There are 6 red, 6 blue, 8 green, 7 purple, and 8 yellow marbles. As students enter the classroom, they draw a marble and keep it. If the first student in the room draws a yellow, and the 2nd draws a purple, what is the probability that the third student will draw a yellow also?

Answer 1

7/25

Explanation:

Let's remove all the marbles that were drawn by the bag first. That makes...

Red: 6

Blue: 6

Purple: 6

Yellow: 7

If we have 7 yellow marbles currently in a bag of 25 marbles, then the chance that the third student draws a yellow is...

7/25

Answer 2

21%

Explanation:

8+7+8+6+6= 35 total marbles

35-2 used = 33 marbles left

100/33 = 3% per marble

7 yellow left x 3 % = 21%