probability, algebra homework help
Stacy started to solve the following probability problem as shown below:
Two cards are drawn from a fair deck of cards without replacement. Find the probability that both cards are Spades.
What is the correct next step to solve the problem?
|
A. s + f = 78 + 1325 = 1404 |
B.  |
C.  |
| D. C(13, 2) • C(52, 2) =78 • 1326 = 103,428 |
Suppose the probability of success of an event is s and the probability of failure is t. What is s + t?
P(s) • P(t)
0
1
cannot be determined
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Stephanie is solves the probability problem below incorrectly. In which line does she first make an error? Find and correct the error in this line.
Brittany plans to take Pre-Calculus, English 12, Physics, Physical Education, Economics, and Anthropology in her senior year. She hopes to have Pre-Calculus and Physics in the morning. What is the probability that her first two classes will be Pre-Calculus or Physics.
A. 
B. 
C. Line 4; correction: P(6, 6) = 6! • 6! =518,400
D.
A committee of four people is to be formed from 6 lawyers and 8 teachers. Find the probability that all of them are teachers. Round to the nearest tenth of a percent.
36.0%
89.0%
1.1%
7.0%
A committee of four people is to be formed from 6 lawyers and 8 teachers. Find the probability that two are teachers and two are lawyers. Round to the nearest tenth of a percent.
42.0%
4.3%
7.0%
75.0%
