Statsmedic Probability

What percentage of the days that it rained, did they forecast no rain?

• About 20%

• About 18%

• About 14%

• About 12%

A bag contains 5 red marbles and 4 pink marbles. A marble is randomly drawn and then replaced. What is the probability the first marble is pink and the second is red?

• 26.9%

• 24.7%

• 20.0%

• 5%

Ben has a basket of 5 red balls, 3 yellow balls, and 2 green balls. What is the probability that the probability he randomly chooses will be red?

• 1/2

• 1/5

• 1/10

• 5/8

A fair number cube is rolled 60 times. The results of the experiment are shown. For which side of the number cube were the experimental and theoretical probability the closest?

• 2

• 5

• 4

• 3

A spinner is spun and the results are shown in the chart. 
Which of the following statements is true about the probability of spinning a blue?

• The experimental probability and theoretical probability are equal.

• The experimental probability is less than the theoretical probability.

• The experimental probability is greater than the theoretical probability.

• The experimental probability cannot be determined from the data.

Which of the following describes experimental probability?

• Perform a situation and count the number of possibilities

• Use trials to count the number of desired outcomes

• Perform an experiment to determine the probability of an event

• Use a formula to determine the expected probability of an event

Which of the following describes theoretical probability?

• Perform a situation and count the number of possibilities

• Use trials to count the number of desired outcomes

• Perform an experiment to determine the probability of an event

• Use a formula to determine the expected probability of an event

A spinner has 5 sections of equal size labeled P, Q, R, S, and T. The arrow of this spinner is spun 15 times and landed 4 times on the section labeled Q.
Which statement best describes the experimental probability and theoretical probability of the arrow landing on the section labeled Q? 

• The experimental probability is 4/15, and the theoretical probability is 1/5.

• The experimental probability is 1/5, and the theoretical probability is 1/5.

• The experimental probability is 4/15, and the theoretical probability is 4/15.

• The experimental probability is 1/5, and the theoretical probability is 4/15.

A bag of marbles has 8 red marbles and 6 purple marbles. Jennifer will randomly select 1 marble from the bag. What is the probability that she will select a purple marble?

• 6/8

• 3/4

• 6/14

• 3/7

A bag of candy contains 2 packs of Skittles, 4 Twizzlers, and 10 Reese's cups. What is the probability of reaching into the bag and choosing either a pack of Skittles or a Reese cup?

• 3/4

• 1/4

• 3/8

• 1/8