In a standard deck of 52 cards, you draw one card. What is the probability of drawing a heart or a spade?
1/52
1/13
1/4
1/2
What does the complement rule in probability state?
The probability of an event not happening is 1 minus the probability of it happening.
The probability of an event happening is equal to the probability of it not happening.
The probability of an event is always 1.
The probability of two events happening is the sum of their individual probabilities.
If the probability of an event happening is 0.3, what is the probability of the event NOT happening?
0.3
0.6
1
0.7
A fair coin is flipped twice. What is the expected value of the number of heads?
0
1.5
2
A company produces light bulbs, and 2% are defective. What is the probability that in a sample of 10 bulbs, exactly one is defective?
0.016
0.833
0.167
0.984
Which of the following is NOT a valid probability value?
0.75
1.25
If a random variable X represents the number of tails in two coin flips, what is P(X = 1) using its Probability Mass Function (PMF)?
0.25
1.00
0.50
What does the expected value (mean) of a random variable represent?
The probability of the variable taking on a specific value.
The spread or dispersion of the variable's values.
The most frequent value the variable takes on.
The average of all possible values, weighted by their probabilities.
A random variable X follows a uniform distribution between 0 and 10. What is the probability that X is greater than 7?
0.1
0.2
Suppose you are playing a game where you flip a coin until you get heads. What is the probability that it takes exactly 4 flips to get the first heads?
1/8
1/16