Question

Find the probability for the experiment of drawing two marbles (without replacement) from a bag containing four green, five yellow, and two red marbles such that both marbles are yellow.

Answer 1

First thing, how many marbles all together?

Answer 2

11

Answer 3

What is the probability that the first one is yellow? the second one?

Answer 4

5/11 , 4/11

Answer 5

almost, notice that you reduced the numerator for the second fraction, we should have done the same with the denominator, after the first pick there is only 10 marbles. What do we do with these two fractions?

Answer 6

multiply them

Answer 7

so it would be 20/110. which reduced equals 2/11

Answer 8

Nice!!

Answer 9

thanks! :)

Answer 10

5/11 and 4/10

Answer 11

Zoheb is correct so 5/11 times 2/5 = 2/11