GED Probability

Theoretical

100

The classic wood carousel at Carousel Park in Hampton, VA has 32 jumping horses and 16 standing horses. What is the probability of randomly selecting a jumping horse (in simplest form)?

2/3

200

Maria is flipping a coin and spinning a spinner. The spinner has 4 equal sections labeled A-D. What is the probability the coin will land on heads and the spinner will land on the letter "A"?

1/8 or 0.125, or 12.5%

300

What is the probability of rolling two odd numbers in a row with a standard number cube?

1/4, or 0.25, or 25%

400

There are 3 red marbles, 2 green marbles, and 1 yellow marble in a box. One marble is taken out and not replaced. A second marble is then taken out and not replaced. What is the probability both marbles that were taken out are red?

1/5, or 0.20, or 20%

500

Jarvonya spins a spinner with 5 equal sections numbered 1-5 and she spins another spinner with 5 equal sections with the letters A-E. What is the probability she will spin a 4 and a B?

1/25 or 0.04, or 4%

Experimental

100

A spinner is spun 20 times.  If you land on red 6 times, what is the experimental probability of getting red (in simplest form)?

3/10

200

Pedro recorded the types of birds that visit his bird feeder. Based on the results below, what is the probability the next bird will be a chickadee? Woodpecker = 3 Chickadee = 5 Cardinal = 1 Sparrow = 13 Blue Jay = 3

1/5, or 0.20, or 20%

300

A letter tile is randomly selected from a bag, recorded, and replaced 100 times. The results are listed below. What is the experimental probability of selecting the letter "E"? A = 16 E = 11 I = 29 O = 19 U = 25

11/100 or 0.11, or 11%

400

A company finds that 4 out of 150 of its magnifying glasses are defective. Based on this information, predict how many defective magnifying glasses you would expect to find in a batch of 2,000.

about 53 magnifying glasses

500

A six-sided die is thrown 50 times and a three is rolled 10 times.  Based on this experiment, how many times would you expect to get a three if the die is rolled 120 times?

24 times

Counting Principle

100

You are trying to decide what to wear to school. You know you have a green pair of pants, a red pair, and a blue pair. You also have a brown shirt, a plaid shirt, and a yellow shirt. How many different outfit combinations can you make?

9

200

What is the number of possible outcomes for spinning one spinner with 8 equal sections and another spinner with 6 equal sections?

48 possible outcomes

300

Amiya and Keyshawn are candidates for class president of the 7th grade. Ajaye, Chishon, and Laura are candidates for vice president. How many winning combinations are possible?

6

400

Ms. French is packing for a trip. She packs a white blouse, a pink blouse, a blue blouse, and a green blouse. She also packs a black suit, a navy blue suit, and a gray suit. What is the probability that the first outfit she wears is the gray suit with a pink blouse?

1 out of 12

500

What is the probability of rolling three 4's in a row on a number cube?

1/216

Measures of Variation

100

Find the range of: 10, 6, 11, 14, 25, 13

19

200

Name any outliers: 10, 37, 42, 38, 75, 40, 33

10 and 75

300

Find the lower and upper quartile: 3 , 6 , 7 , 9 , 10 , 13

lower: 6, upper: 10

400

Find the first and third quartiles : 12, 10, 14, 16, 8

Q1 = 9 and Q3 = 15

500

Find the interquartile range: 10, 6, 22, 12

9

Measures of Central Tendency

100

Find the mean for the following set: 45, 45, 47, 49, 50, 52

 288/ 6 = 48

200

Give a definition for mode.

The value that occurs most often.

300

Find the median: 8, 22, 15, 11, 10

11

400

Find the mean of: 10, 15, 22, 30, 45

24.4

500

Find the median and mode: 25, 16, 18, 16, 24, 30

median 21 and mode 16