Mastering Probability Concepts

What is the probability of rolling a sum of 7 with two six-sided dice?

If a coin is flipped twice, what is the probability of getting at least one head?

A bag contains 3 red balls and 2 blue balls. What is the probability of drawing a red ball first and a blue ball second without replacement?

If two events A and B are independent, and P(A) = 0.4 and P(B) = 0.5, what is P(A and B)?

A factory produces light bulbs, and 90% pass the quality test. If 5 bulbs are tested, what is the expected number of bulbs that pass?

What is the probability of drawing a heart from a standard deck of cards?

If the probability of event A occurring is 0.3, what is the probability of event A not occurring?

A student has a 70% chance of passing a test. If they take the test twice, what is the probability they pass at least once?

In a normal distribution, what percentage of data falls within one standard deviation of the mean?

If a die is rolled, what is the expected value of the outcome?