STATSTISTICS

QUESTION 1

1. Two six-sided dice are thrown. What is the probability that they sum to 8? =  / 

2 points   

QUESTION 2

1. A coin is flipped three times. How many items are in the sample space listing head or tails results?

2 points   

QUESTION 3

1. In how many of these outcomes are there no tails?

1 points   

QUESTION 4

1. A bag contains 25 marbles: 6 green, 4 red, 8 blue, and 7 yellow. Two marbles are drawn from the bag. What is the probability that both marbles are green? Express your answer as a decimal or percentage.

3 points   

QUESTION 5

1. John drives the same route to work every day. He passes through two traffic lights. The tree diagram below describes how frequently his car is stopped. Are the chances at each of the two traffic lights independent or dependent?

1 points   

QUESTION 6

1. What is the probability that both lights will be green?

3 points   

QUESTION 7

1. The probability of event D occurring is 0.50. The probability of event E occurring is 0.80. The two events are independent. What is the probability that at least one of the events (either D or E or both) will occur?

3 points   

QUESTION 8

1. The probability of event A occurring is 0.50. The probability of event B occurring is 0.10. The two events are mutually exclusive. What is the probability that both events (A and B) occur?

3 points   

QUESTION 9

1. For events G and H, P(G) = 0.50, P(H) = 0.50, and P(GandH) = 0.25. Are these events independent or dependent?  What is P(GorH)? 

4 points   

QUESTION 10

1. Two six-sided dice are rolled. What is the probability that at least one of the dice shows a two?

3 points   

QUESTION 11

1. Two six-sided dice are rolled. What is the probability that one of the dice shows a 3 or the dice sum to 10?

3 points   

QUESTION 12

1. A single card is drawn from a standard 52-card deck. What is the probability that the card is an ace or a king?

3 points   

QUESTION 13

1. Two events are ________ if there are no circumstances in which both events occur.

1 points   

QUESTION 14

1. Two events are ________ if the occurrence of one gives no information about the likeliness of occurrence of the other.

1 points   

QUESTION 15

1. The probability of event Q is P(Q) = 0.60. What is the probability that Q does not occur?