How do I approach these problems? Probability

[XodoX]

I have the following two problems and I don't know how to approach them.

A cookie jar has 3 red marbles and 1 white marble. A shoebox has 1 red marble and 1 white marble. Three marbles are chosen at random without replacement from the cookie jar and placed in the shoebox. Then 2 marbles are chosen at random without replacement from the shoebox. What is the probability that both marbles from the shoebox are red?

A fair coin is tossed n times, where n is an even integer. What is the probability that the number of heads exceeds the number of tails?

We talked about payoffs, Simple and Compound Growth,Conditional Probability, Law of total probability, Baye's Theorem. Simple math is obviously not enough, I need to prove it using those topics we covered. I'm not quite sure how to approach those problems. Any input?
Thank you

 

[EnumaElish]

Is this homework?

 

[Redbelly98]

Moderator's note: thread moved to homework forums.

 

[XodoX]

No...

 

[Redbelly98]

Please allow me to clarify something from our forum guidelines:

... homework assignments or textbook style exercises for which you are seeking assistance are to be posted in the appropriate forum in our Homework & Coursework Questions area--not in blogs, visitor messages, PMs, or the main technical forums. This should be done whether the problem is part of one's assigned coursework or just independent study.

Since this is a textbook-style exercise, I moved it to the homework forums. Sorry if this created any confusion.