Answer:


Explanation:
Probability is a measure of the likelihood or chance of an event occurring. The basic formula for probability is:

Question 30
A fair coin has two possible outcomes: heads (H) or tails (T).
Each flip of the coin is independent, meaning the outcome of one flip does not affect the outcome of the other flip.
The probability of flipping a head is P(H) = 1/2.
The probability of filliping a tail is P(T) = 1/2.
To find the probability that the first flip lands heads-up and the second flip lands tails-up, we multiply the individual probabilities together:

So the probability of flipping a coin twice and getting heads on the first flip and tails on the second flip is 1/4 or 25%.

Question 31
There are 10 bottles in total, so there are 10 possible outcomes.
There are 4 lemon-lime drinks in the cooler, therefore the probability of selecting a lemon-lime bottle is:

As you are randomly selecting two bottles with replacement, meaning you return the bottle to the cooler before selecting the next one, the probability of selecting a lemon-lime bottle each time is the same.
To find the probability of that both drinks are lemon-lime flavored, multiply the individual probabilities together:

Therefore, the probability of randomly selecting two drinks from the cooler and getting a lemon-lime drink both times is 4/25 or 16%.