Unit 7 Review Probability

• Top Spinner has higher chance of landing on red.

• Bottom Spinner has higher chance of landing on red.

• They have the same chance of spinning red.

If you do an experiment 20 times and you landed on a 5, seven times. What is the experimental probability of landing on a 5?

• 5/20 = 1/4

• 7/20

• 1/20

• 5/7

If you do an experiment 20 times and you landed on a 5, seven times. About how many times would you land on a 5 if you spin the spinner 100 times?

• 7

• 25

• 30

• 35

Theoretical and Experimental probabilities are always equal.

• True

• False

The more experiments you do, the closer the theoretical and experimental probability will become.

• True

• False

Your bike lock has two wheels. Each wheel is numbered 0 to 9. How many combinations are there?

• 10

• 9

• 100

• 81

Your bike lock has two wheels. Each wheel is numbered 0 to 9. What is the probability you guess your combination correctly?

• 1/100

• 2/100=1/50

• 1/81

• 2/81

You select a candy from the snack machine. There are 5 bags of chips and 6 packs of gum. Is this independent or dependent?

• Independent - the first selection has no impact on the second selection

• Dependent - the first selection changes the number of snacks in the machine for the second selection.

You select a candy from the snack machine. There are 5 bags of chips and 6 packs of gum. What is the probability you select a bag of chips and then another bag of chips?

• 20/110 = 2/11

• 50/121

A jar contains 8 green, 4 blue, 10 red, and 2 yellow Skittles. A Skittle is randomly drawn, REPLACED, then another is drawn. Find each probability.

P(both red)

• 5/144

• 5/138

• 25/140

• 25/144

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