Anyone good at PROBABILITY/FINITE?

[MerlinK]

Yeah, this is wayyy off topic, and is perhaps the most intellectual post ever made on GFY, but I need some late night homework help.:

If you can help me, ICQ me 313 846 394 - i'll pay a tutor to help me solve these problem sets right now!

Problem 1) An experiment consists of flipping a coin 3 times and noting the number of times that a heads is flipped. Find the sample space S of this experiment.
S={HHH, HHT, HTH, HTT, THH, THT, TTH, TTT}
incorrect though, wtf?

A sample space is a set consisting of all possible outcomes of an experiment
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Problem 2) Assume that the die is rolled 3 times. If the result is even, a 0 is recorded. Otherwise, the number is recorded.
How many possible outcomes are in this sample space?


3 (times rolled) x 6 (1-6, # of dice faces) x 3 (# of even #s 1-6) x 3 (# of #s that could be represented by 0, which are odd #s) = 162

this is wrong! what the fuck?
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Problem 3 - this one has me absolutely fucking stumped) Assume that X = {B, E, A, C, G} and Y = {5, 2, 1, 3, 7}. A code consists of 4 different symbols selected from X followed by 4 not necessarily different symbols from Y
How many different codes are possible?


I tried
5 (# of possibilities in X) x 5 (# of possibilities in Y) x 4 (# of symbols selected from X) x 4 (# of symbols selected from Y) = 400

incorrect

[Dirty F]

I'm calling your teacher that you are cheating.

[MerlinK]

I need a tutor - I just need to learn the principles from someone's guidence. No cheating involved.

[soulbleed]

pretty sure your first one is correct , assuming your definition of sample space is correct.