I'm so lost with this stuff!

Question

2.
What is the P (A) if we know that the odds in favor of A occurring are 3 to 4? (See section 9.4)
3.
Find the P (not A) in the situation presented in question 2 above.
4.
The lottery payoff in a letter game at a church social is determined by the single letter the winner holds. There are four letters, A, B, C, and D. The probabilities that each will be drawn are 1243,,, and 10101010
, respectively. The payoffs are $2 for an A, $4 for a B, $8 for a C, and $10 for a D. Compute the expected value of the game. (see page 528)
5.
If 3()5PA=, what are the odds in favor of A occurring?

Answer 1

<<The probabilities that each will be drawn are 1243,,, and 10101010
, respectively.>>

You can't be serious. How are we supposed to make sense out of that?