Topics: Probability theory, Discrete probability distribution, Binomial distribution Pages: 4 (870 words) Published: April 17, 2013
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

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.

When are two events mutually exclusive?
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:

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 king...