19 Questions
| Total Attempts: 93

This is a test over the concepts in the Probability Unit.

Questions and Answers

- 1.True or False: The probability of an event occurring is 1 minus the probability that it doesn’t occur orP(A) = 1- P(not A).
- A.
True

- B.
False

- 2.True or False:Two events are disjoint (mutually exclusive) if they share exactly two outcomes in common.
- A.
True

- B.
False

- 3.
- A.
True

- B.
False

- 4.You draw a card at random from a standard deck of 52 cards. Find the probability of drawing two aces in a row, without replacement.
- A.
0.0045

- B.
0.1538

- C.
0.0059

- D.
0.9955

- 5.The American Red Cross says that about 45% of the U.S. population has Type O blood, 40% type A, 11% Type B, and the rest Type AB. Someone volunteers to give blood. What is the probability that this donor has Type AB blood?
- A.
.4

- B.
.04

- C.
.96

- D.
1

- 6.The American Red Cross says that about 45% of the U.S. population has Type O blood, 40% type A, 11% Type B, and the rest Type AB. Someone volunteers to give blood. What is the probability that this donor has Type A or Type B?
- A.
.51

- B.
.49

- C.
.044

- D.
.04

- 7.The American Red Cross says that about 45% of the U.S. population has Type O blood, 40% type A, 11% Type B, and the rest Type AB. Among four potential donors, what is the probability that all are Type O?
- A.
.09

- B.
.55

- C.
1.8

- D.
.04

- 8.The American Red Cross says that about 45% of the U.S. population has Type O blood, 40% type A, 11% Type B, and the rest Type AB. Among four potential donors, what is the probability that at least one person is Type B?
- A.
.11

- B.
.37

- C.
.63

- D.
.89

- 9.A certain bowler can bowl a strike 70% of the time. What is the probability that she bowls a perfect game (12 consecutive strikes)?
- A.
.01

- B.
8.4

- C.
0

- D.
.3

- 10.You bought a new set of four tires from a manufacturer who just announced a recall because 2% of those tires are defective. What is the probability that at least one of yours is defective?
- A.
.59

- B.
.92

- C.
.41

- D.
.08

- 11.A probability experiment consists of picking one marble from a box that contains a red, a yellow, and a blue marble, and then flipping a coin once. Identify the sample space. (Let R = red, Y = yellow, B = blue, H = head, and T = tail.)
- A.
RY, RB, YB, YR, BR, BY, HT, TH, HH, TT

- B.
RR, YY, BB, HH, TT

- C.
RH, RT, YH, YT, BH, BT

- D.
R, Y, B, H, T

- 12.A random sample of 250 students is taken and classified by type of school and reading ability. What is the probability of randomly picking a student with average reading ability, given the student attends a private school?
- A.
0.534

- B.
0.188

- C.
0.376

- D.
0.352

- 13.Two cards are randomly selected, without replacement, from a standard deck of playing cards. What is the probability of first picking a five and then picking a card other than a five?
- A.
0.505

- B.
0.004

- C.
0.072

- D.
0.071

- 14.The table shows the number of traffic violations by day of occurrence and type of offense for a particular city. Use the table to find the indicated probabilities.A traffic violation is randomly selected. What is the probability that it is a speeding violation?
- A.
0.718

- B.
0.257

- C.
0.190

- D.
0.265

- 15.The table shows the number of traffic violations by day of occurrence and type of offense for a particular city. Use the table to find the indicated probabilities.A traffic violation is randomly selected. What is the probability that it is a speeding violation given that the violation occurred on a weekend?
- A.
0.282

- B.
0.448

- C.
0.075

- D.
0.290

- 16.True or False:The two events can be proven independent if P(B|A) = P(A).
- A.
True

- B.
False

- 17.A check of dorm room son a large college campus revealed that 38% had refrigerators, 52% had TVs, and 21% had both a TV and a refrigerator. What's the probability that a randomly selected dorm room has neither a TV nor a refrigerator?
- A.
0.79

- B.
0.2976

- C.
0.10

- D.
0.90

- 18.If a fair coin is flipped twice with the outcome of each flip independent of each other, what is the probability that two consecutive flips is heads?
- A.
0.25

- B.
0.5

- C.
0.75

- D.
1

- 19.Which of the following would simulate 60% ?
- A.
Randint(0,9); let 0,1,2 represent "success"

- B.
Randint(0,9); let even numbers be a "success"

- C.
Randint(0,9); let 0,1,2,3,4,5 represent a "success"

- D.
Randint(0,9); let getting a 6 represent a "success"