Theoretical Probability Quick Check

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Question
A student has a bag of marbles. There are 5 pink, 7 red, 12 green, 2 blue, and 4 black marbles in the bag. Calculate the theoretical probability of picking a green marble.(1 point)
Responses

720
Start Fraction 7 over 20 End Fraction

25
Start Fraction 2 over 5 End Fraction

35
Start Fraction 3 over 5 End Fraction

1
1

Correct Response:

Start Fraction 12 over 30 End Fraction = Start Fraction 2 over 5 End Fraction