6th Week Assessment - 4th Quarter

When rolling a fair die 50 times, what is the probability of rolling a "4" exactly 15 times?

In the given problem which represents the probability of success (p)?

• 1/6

• 1/4

• 1

• 0

A coin is tossed ten times. What is the probability that there are exactly 6 heads?

In the given situation, which represents the number of successes (k)?

• exactly 6 heads

• tossed ten times

• 50%

• 0

Suppose 40% of Americans will vote for Hillary Clinton on election day. If a random sample of 10 voters are selected, what is the probability that more than 4 will vote for Clinton?

In the given situation, which represents the probability of failure (1-p)?

• more than 4 will vote

• 10 voters

• 40%

• 60%

A coin is tossed ten times. What is the probability that there are exactly 3 heads?

In the given situation, which represents the number of trials (n)?

• exactly 3 heads

• tossed ten times

• 50%

• 0

The American Red Cross says that about 11% of the U.S. population has Type B blood. A blood drive is being held at your school.What is the probability that exactly 2 of the first 20 blood donors have Type B blood?

• 0.316

• 0.282

• 0.001

• Not here

You trick Miss Soldan into playing for the juniors in the Powder Puff football game. As a quarterback, she typically completes 3% of her passes. If she has 25 passes in the game, what is the probability that she will 21 incomplete passes?

• 0.0054

• 0

• 0.0001

• 0.99

A random sample of 15 people is taken from a population in which 40% favour a particular political stand. What is the probability that exactly 6 individuals in the sample favour this political stand?

• 0.4000

• 0.5000

• 0.2066

• 0.0041

Experience has shown that a certain lie detector will show a positive reading (indicates a lie) 10% of the time when a person is telling the truth and 95% of the time when a person is lying. Suppose that a random sample of 5 suspects is subjected to a lie detector test regarding a recent one-person crime. Then the probability of observing 3 positive readings if all suspects plead innocent and are telling the truth is

• 0.409

• 0.735

• 0.0081

• 0.5905

It has been estimated that about 30% of frozen chicken contain enough salmonella bacteria to cause illness if improperly cooked. A consumer purchases 12 frozen chickens. What is the probability that the consumer will have more than 6 contaminated chickens?

• 0.961

• 0.118

• 0.882

• 0.039

The probability that a certain machine will produce a defective item is 1/4. If a random sample of 6 items is taken from the output of this machine, what is the probability that there will be 5 or more defectives in the sample?

• 19/4096

• 18/4096

• 4/4096

• 3/4096