Question

A bag has 4 green marbles, 3 red marbles, and 3 yellow marbles. What is the probability that you pick a yellow marble, do not replace it, and pick another yellow marble?

Answer 1

2/15

1/15

1/9

3/10

Answer 2

7

Answer 3

huh?

Answer 4

7 what

Answer 5

(total yellow marbles) / (total marbles) gets us the probability each time

there are 3 yellow to start with out of 10 , so first we have 3/10

after this we have 2 yellows left and 9 marbles in total so this time its 2/9

for both events to happen we have to multiply them:

\[\frac{3}{10} \times \frac{2}{9} = \frac{1}{15}\]

Answer 6

probability of picking yellow(3) will be 3/10
since u are not replacing it ,now there are 9 marbles,to get yellow(2),the probability is 2/9
so,overall probab.=3/10*2/9=1/15

Answer 7

if you still dont understand i could draw a tree-diagram to show you :)

Answer 8

so b

Answer 9

thanks!!

Answer 10

i dont know what she means by 7 either...