Understanding Simple Events in Probability

What is a simple event in probability?

• A simple event is an event with a single outcome.

• A simple event is defined by its probability only.

• A simple event includes multiple outcomes.

• A simple event is an event that cannot occur.

If a die is rolled, what is the probability of rolling a 4?

• 1/12

• 1/3

• 1/6

• 1/2

List the sample space for flipping a coin twice.

• HTH

• ["HH", "HT", "TH", "TT"]

• TTH

• HHH

Using the formula P(A) = Number of favorable outcomes / Total outcomes, calculate the probability of drawing an Ace from a standard deck of cards.

• 1/13

• 1/12

• 1/15

• 1/10

If a bag contains 3 red balls and 2 blue balls, what is the probability of randomly selecting a red ball?

• 2/5

• 3/5

• 1/2

• 4/5

In a class of 30 students, 18 are girls. What is the probability of randomly selecting a girl?

• 0.6

• 0.7

• 0.5

• 0.4

If you toss a coin and roll a die, what is the sample space of the combined events?

• {(H,1), (T,1), (H,2), (T,2)}

• {(H,1), (H,2), (H,3), (H,4), (H,5), (H,6), (T,1), (T,2), (T,3), (T,4), (T,5), (T,6)}

• {(H,1), (H,2), (H,3), (H,4), (H,5)}

• {(H,1), (H,2), (H,3), (H,4)}

A jar contains 5 green and 3 yellow marbles. What is the probability of picking a yellow marble?

• 1/2

• 3/8

• 4/8

• 2/5

If the probability of rain tomorrow is 0.3, what is the probability that it will not rain?

• 0.2

• 0.5

• 0.9

• 0.7

Explain what it means if the probability of an event is 0.75.

• The event is likely to occur with a high probability.

• The event is equally likely to occur or not occur.

• The event has no chance of occurring.

• The event will definitely not occur.