Question 1:
A bag contains 5 black marbles, 7 blue marbles, 3 green marbles, 4 red marbles, and 1 white marble. A marble is selected and then replaced. What is the probability of selecting a black marble?
A 1/5
B 1/4
C 1/20
D 5
Question 2:
Mark has a bag of pink, blue and white gumballs. He randomly selects a gumball from the bag 30 times and records the color of the gumball each time. Before he selects another gumball he replaces the gumball he has already selected. The results are summarized in the table below.
Pink Blue White
Number of Times 8 12 10
Based on these results, determine whether each statement is True or False.
A The experimental probability of pink is 0.8
True
False
B The experimental probability of blue is 0.4
True
False
C It is more likely that Matk will select a blue gumball than a white gumball
True
False
Question 3:
When students line up in the cafeteria, they can choose their main course, drink, and dessert. For the main course students can choose a hot dog, burger, or pizza. For the drink they can choose between water, milk, or soda. And for the dessert they can choose cake or ice cream. The tree diagram shows all possible combinations of meals. Choose two correct answers below.
A The probability of randomly choosing pizza and cake is 3/18
Correct
Incorrect
B The probability of randomly choosing a hot dog, water, and ice cream is 1/3
Correct
Incorrect
C The probability of randomly choosing a burger and water is 1/18
Correct
Incorrect
D The probability of randomly choosing a burger, water, and cake is 1/18
Correct
Incorrect
E The probability of randomly choosing pizza is 1/18
Correct
Incorrect
100 points are awarded to the ones how answer right