Keystone Algebra 1: Data Analysis (Probability)

There is a 10% chance it will rain on Saturday and a 30% chance it will rain on Sunday. What percent chance is there that it will rain on both Saturday and Sunday?

• 3%

• 15%

• 20%

• 40%

In a shipment of alarm clocks, the probability that one alarm clock is defective is 0.04. Charlie selects three alarm clocks at random. If he puts each clock back with the rest of the shipment before selecting the next one, what is the probability that all three alarm clocks would be defective?

• 0.000064

• 0.00012

• 0.064

• 0.12

Stefan rolls a 1–6 number cube and flips a coin. What is the probability he rolls a number less than 5 and the coin lands on tails?

• A. 8 1/3%

• B. 33 1/3%

• C. 41 2/3%

• D. 66 2/3%

A cafeteria has 5 turkey sandwiches, 6 cheese sandwiches, and 4 tuna sandwiches. There are two students in line and each will take a sandwich. What is the probability that the first student takes a cheese sandwich and the next student takes a turkey sandwich?

If Natasha picks bows at random, what percent chance is there that the first two gifts she wraps will have a white bow?

• 0.8%

• 5%

• 5.76%

• 24%

A builder has 8 lots available for sale. - 6 lots are greater than one acre. - 2 lots are less than one acre. What is the probability that the next three lots sold will be greater than one acre?

• 3/4

• 15/28

• 27/64

• 5/14

Wade is playing darts. Each dart throw scores a certain number of points, depending on where on the dartboard it lands. A throw that misses the dartboard completely is worth 0 points. The table shows the probability of scoring 8, 5, 3, 2, or 0 points on any given throw. If Wade throws two darts, what is the probability his total score will be exactly 10 points?

• 0.3

• 0.1

• 0.03

• 0.07

There are 3 black marbles and 4 red marbles in a bag. Trevor will take out 2 marbles without looking. What is the probability that both marbles will be black? Explain how you found your answer.

There are 3 black marbles and 4 red marbles in a bag. Suppose that Trevor takes out 1 marble, replaces it in the bag, then takes out another marble. What is the probability that both marbles will be black in this situation? Explain how you found your answer.