TEKS.MATH.9-12.V.B

The table represents the probability of guessing correct on a 5 question true-false quiz. Find the mean number of questions one gets correct when guessing.

• 2.5
• 3
• 3.5
• 1.5

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TEKS.MATH.9-12.V.B

What is the probability that a student does play a sport given they do not play an instrument? 

• .2
• .2222
• .10
• .5

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TEKS.MATH.9-12.V.B

Lilah flips a coin. What is the chance the coin comes up with the first tails in fewer than 5 flips?

• geometcdf(1/2, 5)
• geometpdf(1/2, 5)
• geometcdf(1/2, 4)
• geometpdf(1/2, 4)

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TEKS.MATH.9-12.V.B

In hockey, 5 players from each team take shots if the game ends in a tie (a shootout). The chances of making a goal in a shootout is low, only 14%. If the Caps and Penguins go into a shootout, what is the probability that the first goal scored is after the first four shots?

• 0.64
• 0.47
• 0.45
• 0.55

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TEKS.MATH.9-12.V.B

Theoretical Probability is?

• What Should happen
• What does happen
• What Will Happen
• What I want to Happen

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TEKS.MATH.9-12.V.B

Given the probability model in the table below, what is the expected value of the random variable?
  X        50          20        5
P(X)     0.1         0.3      0.6

• 14
• 4.67
• 5
• 7.5

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TEKS.MATH.9-12.V.B

A bag contains 5 quarters, 2 dimes, and 4 pennies. What is the probability of picking a quarter?

• 5/11
• 5/6
• 1/3
• 5

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TEKS.MATH.9-12.V.B

A letter of the alphabet is chosen at random, then a coin is flipped. What is the probability of choosing a letter from the word MATH then getting tails? 

• 4/26 + 1/2
• 4/26 x 1/2
• 4/25 x 1/2
• 4/25 + 1/2

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TEKS.MATH.9-12.V.B

What is the probability of spinning green?

• 0
• 1/4
• 1/2
• 3/4

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TEKS.MATH.9-12.V.B

If you roll one die, what is the probability of getting an even number or a multiple of 3?

• 1/3
• 2/3
• 1/2
• 1/6

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TEKS.MATH.9-12.V.B