Flashcard 5B.2 (Multiplication and Addition Rules of Probability)

Front

What is the probability of getting tails when flipping a fair coin?

Back

1/2

Front

If you flip a coin three times, what is the probability of getting all tails?

Back

1/8

Front

What is the formula for calculating the probability of two independent events both occurring?

Back

P(A and B) = P(A) * P(B)

Front

What is the probability of it raining today if the chance is 30%?

Back

30%

Front

What is the probability that it will NOT rain today if the chance of rain is 30%?

Back

70%

Front

If the probability of rain on Monday is 4/5 and on Tuesday is 2/3, how do you find the probability it will rain both days?

Back

Multiply the probabilities: (4/5) * (2/3) = 8/15

Front

What is the probability of choosing a black marble from a bag containing 4 black and 2 white marbles?

Back

4/6 or 2/3

Front

If you choose a black marble and do not replace it, what is the probability of then choosing a white marble?

Back

2/5

Front

What is the probability of a person owning either an SUV or a car if 31% own an SUV, 74% own a car, and 10% own both?

Back

P(SUV or Car) = P(SUV) + P(Car) - P(SUV and Car) = 31% + 74% - 10% = 95%.

Front

What is the addition rule of probability?

Back

P(A or B) = P(A) + P(B) - P(A and B)