Understanding Basic Probability Concepts

A bag contains 3 red marbles, 5 blue marbles, and 2 green marbles. What is the probability of randomly picking a blue marble? Express your answer as a fraction.

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NY.MA.NY-6.SP.6

If you flip a fair coin 100 times, about how many times would you expect it to land on heads?

• 10

• 25

• 50

• 75

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NY.MA.NY-6.SP.7

Which of the following probabilities represents an event that is very unlikely to happen?

• 0.95

• 0.5

• 0.1

• 0.8

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NY.MA.NY-6.SP.6

A spinner is divided into 4 equal sections: red, blue, green, and yellow. What is the probability of landing on green? Express your answer as a percent.

• 10%

• 25%

• 50%

• 75%

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NY.MA.NY-6.SP.6

You roll a standard six-sided die 60 times. About how many times would you expect to roll a 4?

• 5

• 10

• 15

• 20

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NY.MA.NY-6.SP.7

Which of the following probabilities is impossible?

• 0

• 0.25

• 0.5

• 1

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NY.MA.NY-6.SP.6

A bag contains 8 green marbles and 2 yellow marbles. What is the probability of picking a yellow marble? Express your answer as a decimal.

• 0.1

• 0.2

• 0.5

• 0.8

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NY.MA.NY-6.SP.6

If the probability of raining tomorrow is 0.8, how many days out of 100 would you expect it to rain?

• 8

• 20

• 80

• 100

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NY.MA.NY-6.SP.7

Which of the following probabilities represents an event that is certain to happen?

• 0

• 0.25

• 0.5

• 1

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NY.MA.NY-6.SP.6

A coin is flipped 200 times. If the probability of getting tails is 0.5, about how many times would you expect to get tails?

• 25

• 50

• 100

• 200

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NY.MA.NY-6.SP.7