Road Rage
A coin is tossed four times. The probability is ¼ or 0.25 that all four tosses will result in a head face up.
Answer
Correct Answer: False
A firm offers routine physical examinations as part of a health service program for its employees. The exams showed that 8% of the employees needed corrective shoes, 15% needed major dental work and 3% needed both corrective shoes and major dental work. What is the probability that an employee selected at random will need either corrective shoes or major dental work?
Correct Answer:
0.20
A group of employees of Unique Services will be surveyed about a new pension plan. In-depth interviews with each employee selected in the sample will be conducted. The employees are classified as follows.
What is the probability that the first person selected is classified as a maintenance employee?
Correct Answer:
0.025
A probability is a number from -1 to +1.
Correct Answer: False
When are two events mutually exclusive?
Correct Answer:
If one event occurs, then the other cannot There are 10 rolls of film in a box and 3 are defective. Two rolls are selected without replacement. What is the probability of selecting a defective roll followed by another defective roll?
Correct Answer:
1/15 or about 0.07
Three defective electric toothbrushes were accidentally shipped to a drugstore by the manufacturer along with 17 non-defective ones. What is the probability that the first two electric toothbrushes sold will be returned to the drugstore because they are defective?
Correct Answer:
3/190 or 0.01579
The first card selected from a standard 52-card deck was a king. If it is NOT returned to the deck, what is the probability that a king will be drawn on the second selection?
Correct Answer:
3/51 or 0.0588 The first card selected from a standard 52-card deck was a king. If it is returned to the deck, what is the probability that a
Answer
Correct Answer: False
A firm offers routine physical examinations as part of a health service program for its employees. The exams showed that 8% of the employees needed corrective shoes, 15% needed major dental work and 3% needed both corrective shoes and major dental work. What is the probability that an employee selected at random will need either corrective shoes or major dental work?
Correct Answer:
0.20
A group of employees of Unique Services will be surveyed about a new pension plan. In-depth interviews with each employee selected in the sample will be conducted. The employees are classified as follows.
What is the probability that the first person selected is classified as a maintenance employee?
Correct Answer:
0.025
A probability is a number from -1 to +1.
Correct Answer: False
When are two events mutually exclusive?
Correct Answer:
If one event occurs, then the other cannot There are 10 rolls of film in a box and 3 are defective. Two rolls are selected without replacement. What is the probability of selecting a defective roll followed by another defective roll?
Correct Answer:
1/15 or about 0.07
Three defective electric toothbrushes were accidentally shipped to a drugstore by the manufacturer along with 17 non-defective ones. What is the probability that the first two electric toothbrushes sold will be returned to the drugstore because they are defective?
Correct Answer:
3/190 or 0.01579
The first card selected from a standard 52-card deck was a king. If it is NOT returned to the deck, what is the probability that a king will be drawn on the second selection?
Correct Answer:
3/51 or 0.0588 The first card selected from a standard 52-card deck was a king. If it is returned to the deck, what is the probability that a