What am I doing wrong? (Probability)

The question is:
A large bag of marbles contains equal amounts of each of 5 colors (red, orange, yellow, green, and blue). Joaquin selects 1 marble, looks at it, puts it back, and then selects another. Find the probability of Joaquin selecting a yellow marble both times.
___

I figured I had to find the probability of picking a Y out of 10 marbles. (I just chose ten as it would be easiest?) So that means there would be two Y marbles in said bag.

So, total = 10
And each time, you should have 2/10 as the probability of piking out a Y marble.

Question

What am I doing wrong? (Probability)

The question is:
A large bag of marbles contains equal amounts of each of 5 colors (red, orange, yellow, green, and blue). Joaquin selects 1 marble, looks at it, puts it back, and then selects another. Find the probability of Joaquin selecting a yellow marble both times.
___

I figured I had to find the probability of picking a Y out of 10 marbles. (I just chose ten as it would be easiest?) So that means there would be two Y marbles in said bag.

So, total = 10
And each time, you should have 2/10 as the probability of piking out a Y marble.

anonymous · Answer

2/10 + 2/10 = 4/10 = 2/5 = 0.4

But that is not an option?

anonymous · Answer

The choices are:
A. 0.5
B. 0.04
C. 0.008
D. 0.25

My question is what am I doing wrong?

acxbox22 · Answer

you can just take it out of 5
1 yellow out of 5 total for 1st time
1 yellow out of 5 total for second time
now the mistake you did was too add them...

anonymous · Answer

OHH! Understood! Thank you @acxbox22 :)

acxbox22 · Answer

:)