Sorry for no explanation , but here is the answer. I hope that helped
Explanation: 3/9 times 3/10 equals 9/90, simplify and you'll get 1/10
There are 3 red, that is where the first numerator comes from and there are 10 marbles so that is where the denominator comes from. There are 3 yellows, hence the second numerator but as we have taken a marble out there are now only 9 marbles in total.
There is a total of 4 + 3 + 3 = 10 marbles.
There are 4 green marbles, so the probability that the first marble is green is 4/10.
The marble is not replaced, so there are now 9 marbles in the bag. 3 of the marbles are red, so the probability that the second marble is red is 3/9.
The total probability is:
P = 4/10 × 3/9
P = 2/15
Number 2 1/2
Number 3 3/10 (not quite sure though)
Hope this helps!!! :)
Then there is a 4/9 chance of getting a green afterwards.
3/10 × 4/9
total = principal × ( 1 + rate ) ^ years
total = 600 * (1.04)^5
total = 729.99
answer is c