04. Learning Objectives - Probability

Learning Objectives - Probability

Which of the following are true statements about a fair coin?
SOLUTION:
  • The probability of heads is the same as the probability of tails.
  • When flipping a coin multiple times, each flip is an **independent event**.

QUESTION:

At a particular intersection, cars can either:

  1. Turn left

  2. Go straight

  3. Turn right

Cars tend to turn left with a probability of 0.4 and go straight with a probability of 0.25. What is the probability that a car turns right?

SOLUTION:

NOTE: The solutions are expressed in RegEx pattern. Udacity uses these patterns to check the given answer

You flip a fair coin 3 times. What's the probability that all three flips are heads?
SOLUTION: 0.125

You flip a fair coin two times. What's the probability that at least one flip is heads?
SOLUTION: 0.75

You roll two six sided dice and then add the numbers together. What's the probability that the sum is equal to 7?
SOLUTION: 1/6

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