What is the greatest possible probability in any experiment?

ANSWER: B

Emily is a very good student. She is more likely to attend class than to miss class. Which could be the probability that she misses class tomorrow?

ANSWER: B

Ilana drew a marble at random from a bag containing 4 blue, 3 red, 2 yellow, and 5 green marbles. What is the probability that she picked a marble that is not red?

ANSWER: B

In the game of bridge, a player’s hand contains 13 cards. Kevin was dealt a hand containing 5 spades, 3 hearts, 4 diamonds, and 1 club. Which is the correct probability model for picking one card at random from Kevin’s hand?

ANSWER: D

A six-sided number cube is “weighted” so that the numbers do not all have the same probability of landing up. The probability model is shown.

ANSWER: B

Determine whether the number could be the probability of an event. Explain your reasoning.

2.3

ANSWER: A probability stays between 0 and 1. 0 is the lowest, and 1 is the highest. I think you might be able to answer this yourself. If not, the answer is NO.

Determine the approximate probability of the events as 0,
1
2
1
2
, or 1.

0, 1, 1/2, 1

Determine whether the number could be the probability of an event. Explain your reasoning.

-0.25

ANSWER: Same as the one above.

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The correct probability for an event always falls between 0 and 1, inclusive. The probability of an event cannot be negative. So, in this case, the number -0.25 cannot be the probability of an event. The answer is NO.