Originally Posted by

**mdenham2** I have a 4-question worksheet and I think I have them all correct except for one:

1) A sorority sold 65 tickets in a raffle for a $480 TV set. What is the expected value of a single ticket if only one ticket wins?

- I'm stumped.

The other 4 questions I believe are correct--could someone confirm?

2) A box contains 4 blue cards and 3 red cards. If 2 cards are drawn one at a time, find the probability that both are red with replacement and without replacement.

- 9/49 with replacement correct

- 1/7 without replacement correct

3) Two dice are rolled. What are the odds against rolling a sum of 4 or 11?

- 31/5

4) In a NASA rocket firing, the probability of success of the 1st stage=70%, 2nd stage=56%, and 3rd stage=80%. What is the probability for success fir the three stage rocket?

- (70/100) x (56/100) x (80/100) = 196/625

Thank You!