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1. A group os students were asked if they carry a credit card. The responses are listed below:

Freshman-- 24(CC Carrier)--36(Not a CC Carrier)--Total(60)
Sophmore--37(CC Carrier)--3 (Not a CC Carrier)--Total(40)
Total----------61(CC Carrier)-39(Not a CC Carrier)--Total(100)

If a student is selected at random, find the probability that he or she owns a credit card given that the student is a freshman. Round your answer to three decimal places.

A. 0.400
B. 0.600
C. 0.240
D. 0.393

2. Classify the events as dependent or independent. Events A and B where P(A)=0.8, P(B)=0.1, and P(A and B)=0.07

A. dependent
B. Independent

3. You are dealt two cards successively without replacement from a standard deck of 52 playing cards. Find the probability that the first card is a two and the second card is a ten. Round your answer to three decimal places.

A. 0.006
B. 0.250
C. 0.500
D. 0.994

2007-10-12 18:38:43 · 2 answers · asked by wobble692001 1 in Science & Mathematics Mathematics

2 answers

1. D P(freshman|has card)= 24/61
2. Dependent. There is a non-zero P(AB)
3. A. The probability of a 2 is 4/52 or 1/13. The probability of a ten following is 4/51.

2007-10-12 18:45:49 · answer #1 · answered by cattbarf 7 · 0 0

1. Well out of 60 total freshman, 24 were carriers. So the odds of picking one of them is 24/60, which is A, or 40%, or .4.

2. I'm unsure, I never had to do problems like that. Or maybe I'm just tired.

3. Chance of getting a 2: 4/52
Chance of getting a 10: 4/52
Chance of getting them consecutively: 4/52*4/52=1/169 which is approx .0059, rounded to .006 so the answer is A.

2007-10-12 18:45:53 · answer #2 · answered by Anonymous · 0 0

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