Math Help Please?

Part A:

There are 3 possible outcomes that result in at least one red ball:
{RR, RB, BR}

Only one of the conditional outcomes has two red balls {RR}, so the probability is 1/3.

Answer - part a:
1/3

UPDATE:

Part B:

There are 4 ways you could have gotten to the case where a red ball rolls out of the urn.
1) RB and the first (red) ball rolls out.
2) BR and the second (red) ball rolls out.
3) RR and the first (red) ball rolls out.
4) RR and the second (red) ball rolls out.

That's 2 ways out of 4. So the probability of the second scenario is 1/2 (not 1/3).

Answer - part b:
1/2

1/3

Don't rephrase when you can't solve the them. By doing so you change the meaning of the original question.

Your English is bad in terms of this question.