Probability Quiz

definition of outcome

• beginning of an event

• middle of a situation

• the result of an experiment

• end of a process

Answer explanation

The correct definition of outcome is the result of an experiment, making it the most suitable choice among the options provided.

A number between 0 and 1 used to quantify __________ for processes that have uncertain outcomes (such as tossing a coin, selecting a person at random from a group of people, tossing ball at a target, or testing for a medical condition).

Answer explanation

A number between 0 and 1 used to quantify probability for processes that have uncertain outcomes.

Madison has 3 apples, 7 oranges, 5 pears, and 13 mangoes in a bag. How would you find the probability of Madison picking an orange? Explain using 2-3 sentences.

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Answer explanation

To find the probability of Madison picking an orange, divide the number of oranges (7) by the total number of fruits (3+7+5+13=28). So, the probability is 7/28 or 1/4.

Yves has a wheel with the colors red, green, blue, and purple. She wants the wheel 8 times. How many times can Yves expect to land on both red and green?

• 2

• 6

• 4

• 8

Answer explanation

Yves can expect to land on both red and green 4 times out of 8 spins since there are 4 colors and she wants the wheel 8 times, so 8/4 = 2 times for each color pair, resulting in 2 x 2 = 4 times for red and green.

There is a class of 18 students, 12 of them being girls. The principal wants to randomly select someone in the class to assist him in the new school event. What is the probability the principal will select a boy?

• 66%

• 8%

• 33%

• 75%

Answer explanation

The probability of selecting a boy is the number of boys divided by the total number of students, which is 6 boys out of 18 students, resulting in a 33% chance.

experimental probability

• experimental probability is the number of times the event actually occurs divided by the total number of trials in the experiment

• experimental probability is always equal to 1 or zero

• experimental probability is calculated using the theoretical outcomes in the experiment

• experimental probability is not influenced by sample size unless they are greater than 20

Answer explanation

experimental probability is the number of times the event actually occurs divided by the total number of trials in the experiment

frequency

• Frequency is the speed of sound divided by light

• Frequency is the distance between two points

• Frequency is the weight of an object

• Frequency is the total number of times an event occurs

Answer explanation

Frequency is the total number of times an event occurs

probability is a number between...

• -1 and 2

• 0 and 2

• 0 and 100

• 0 and 1

Answer explanation

Probability is a number between 0 and 1, representing the likelihood of an event occurring. Therefore, the correct range for probability is 0 and 1.

The probability that I will pull a spade in a deck of 52 cards is ___

Answer explanation

The probability of pulling a spade in a deck of 52 cards is 1/4, as there are 13 spades in a deck of 52 cards (4 suits with 13 cards each).

If I flip a coin, what is the probability I will get heads?

• 100%

• 50%

• 30%

• 80%

Answer explanation

When flipping a coin, there are two possible outcomes - heads or tails. Since each outcome has an equal chance of occurring, the probability of getting heads is 50%.