7th Grade Probability Quiz

The closer the probablity of an event is to 1, the less likely it is to happen. ​ ​ (a)  

• False
• True

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Probability

If the probability is equal to zero, that means it can never happen. ​ ​ (a)  

• True
• False

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Probability

Theoretical probability means that the result of the first event affects the probability of the second event. ​ (a)  

• False
• True

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Probability

A tree diagram is a helpful tool to determine the number of outcomes in a sample space. ​ ​ (a)  

• True
• False

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Probability

The fundamental counting principle helps determine the number of outcomes. ​ (a)  

• True
• False

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Probability

How many possible outcomes / sample space

(bottom number in the fraction)

• picking a number from 1 to 4 and choosing the color red, green, or yellow

• 18

• Christmas sweatshirts come in three sizes and six colors.

• 27

• A number cube is rolled three times.

• 12

• tossing a nickel and tossing a quarter

• 4

• Isabelle has a choice of 3 colors of pants, 3 colors of shirts, and 3 kinds of shoes.

• 216

Tags

Probability

sample space

How many possible outcomes / sample space

(bottom number in the fraction)

• There are three answer choices for each of 6 multiple choice questions.

• 42

• A one-topping pizza comes in three sizes with thin or thick crust and a choice of seven toppings.

• 18

• A number cube is rolled and a number card is drawn from cards numbered 1-14.

• 12

• A new car is available with standard or automatic transmission, two or four doors, and 10 colors

• 84

• A quiz has six true-false questions.

• 40

Tags

sample space

Probability

A jar contains 5 blue marbles, 8 red marbles, 4 white marbles, and 3 purple marbles. Suppose you pick a marble at random without looking. Find the probability of each event. Write your answer as a fraction in simplest form.

P(red)

Mathematical Equivalence

ON

Tags

simple probability

A jar contains 5 blue marbles, 8 red marbles, 4 white marbles, and 3 purple marbles. Suppose you pick a marble at random without looking. Find the probability of each event. Write your answer as a fraction in simplest form.

P(blue)

Mathematical Equivalence

ON

Tags

simple probability

A jar contains 5 blue marbles, 8 red marbles, 4 white marbles, and 3 purple marbles. Suppose you pick a marble at random without looking. Find the probability of each event. Write your answer as a fraction in simplest form.

P(red or white)

Mathematical Equivalence

ON

Tags

simple probability