Short Answer Probabilty

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ITC 321

What is the probability of rolling 2, 6 sided dice and adding their values together so that the sum is equal to 7? (Be sure to simplify your answers)

Answer: 1/6
Why: 1 & 6, 6 &1, 2 & 4, 4 & 2, 3 & 3, 3 & 3 a total of 6 scenerios out of 36 possiblities fit this description. 6/36 simplifies to 1/6

What is the probability of rolling 2, 6 sided dice and adding their values together so that the sum is equal to 7 or 2?

Answer: 7/36
Why: probability of a 7 + probability of a 2
1/6 + 1/36

What is the probability of flipping a fair sided coin and getting tails 5 times in a row?

Answer: 1/32
Why: 1/2 x 1/2 x 1/2 x 1/2 x 1/2

There is 3 red marbles, 5 blue marbles, 2 yelllow marbles, and 1 green marble. What is the probability of picking a red marble out of a bag?

Answer: 3/11
Why: total of 11 marbles (3 + 5 + 2 + 1 = 11) and 3 of which are red

What is the probability of rolling a 6 sided dice and having it land a 6 three times in a row?

Answer: 1/216
Why: 1/6 x 1/6 x 1/6

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