Quiz about Probability Review for 7th grade

Question 1

A box contains 5 purple marbles, 3 green marbles and 2 orange marbles. Draws are made without replacement. What is the probability both marbles are purple?

P(both marbles are purple)

Accepted Answer

2/9

Answer

1/3

Answer

1/2

Answer

1/4

Question 2

How many outcomes? You can choose from 3 different meats and 3 different cheeses.

Accepted Answer

9

Answer

3

Answer

6

Answer

24

Question 3

A spinner has 8 sections: 2 purple, 2 yellow, 3 blue, and 1 red.
What is the probability of spinning and landing on a blue or purple section?

Accepted Answer

P(blue or purple) = 5/8

Answer

P(blue or purple) = 2/8

Answer

P(blue or purple) = 3

Question 4

You roll two die.
What is the probability you will roll a 4, then roll a number less than 3?

Accepted Answer

1/18

Answer

1/36

Answer

1/9

Answer

1/6

Question 5

A box contains 3 black pens, 7 blue pens, and 5 red pens. Without looking, Juan randomly picks a red pen out of the box. If he chooses another pen out of the box without replacing the first one, what is the probability that he will pick a red pen both times?

Accepted Answer

2/21

Answer

1/9

Answer

5/42

Answer

9/29

Question 6

Dependent or Independent:
You flip a coin and then roll a fair six-sided die. The coin lands heads-up and the die shows a one.

Accepted Answer

Independent

Answer

Dependent

Question 7

Clare picks a marble at random, puts it back, and then picks another marble at random.

Accepted Answer

Independent

Answer

Dependent

Question 8

Christopher picks a marble at random. Without putting the first marble back, he picks a second marble at random.

Accepted Answer

Dependent

Answer

Independent

Question 9

At summer camp, the campers pick two activities for the first day of camp. They can choose from among hiking, canoeing, rock climbing, and bird watching. How many different combinations of activities are there?

Accepted Answer

8

Answer

6

Answer

12

Answer

2

Question 10

A restaurant offers four sizes of pizza, two types of crust, and eight toppings. How many possibles combinations of pizza with one topping are there?

Accepted Answer

64

Answer

14

Answer

4

Answer

112

Question 11

The cafeteria is serving three kinds of sandwiches:  tuna (T), chicken, (C), and peanut butter (P).  They are also serving a choice of two drinks:  milk (M) or water (W).  Which is the complete set of possibilities of combinations?

Accepted Answer

TW, TM, CW, CM, PW, PM

Answer

TW, CW, PW

Answer

TW, TM, TW, CW, PW

Question 12

On a 6-sided die, which is more likely?

Accepted Answer

They are both equally likely.

Answer

Rolling an odd number

Answer

Rolling an even number

Question 13

Aaron took a multiple choice test.  There were 25 questions, of which he answered 4 incorrectly.  At this rate, how many questions should Aaron expect to answer incorrectly if he takes a test with a total of 150 questions?

Accepted Answer

24

Answer

123

Answer

373

Answer

47

Question 14

In a drawer, there are 6 white socks, 4 black socks, and 2 brown socks. You pick out a sock, replace it, then pick out a 2nd sock. What is the probability that you will pick a brown, then black sock?

Accepted Answer

1/18

Answer

1/11

Answer

1/36

Answer

2/33

Question 15

If the probability of an event is 0.99, which of the following best describes the event?

Accepted Answer

The event is likely to occur

Answer

The event will never occur

Answer

There is a small chance that the event will occur

Answer

The event will definitely occur

Question 16

Rylee is on a weekend fishing trip with her family. So far she has caught 4 trout, 10 catfish, and 13 bluegill. What is the probability that the next fish that Rylee catches will be a catfish?

Accepted Answer

37%

Answer

15%

Answer

48%

Answer

38%

Question 17

What is the experimental probability of tails? (based on image)

Accepted Answer

7/16

Answer

1/2

Answer

9/16

Question 18

Based on the chart, what is the experimental probability of pulling a green marble?

Accepted Answer

8/25

Answer

1/8

Answer

8/100

Answer

7/8

Question 19

A number cube is rolled 48 times. According to theoretical probability, how many times should the number 4 appear?

Accepted Answer

8

Answer

5

Answer

6

Answer

7

Question 20

The probability of severe hail is 0.6. What is the probability of NOT having severe hail?

Accepted Answer

0.4

Answer

0.6

Answer

0.65

Answer

0.2

Question 21

The probability that the event will not happen is called the ____ of the event.

Accepted Answer

complement

Answer

variant

Answer

Law of Large Numbers

Answer

Counting Principle

Question 22

A bag contains 5 yellow, 4 green, and 2 blue marbles. One marble is drawn and immediately put back in the bag. Then a second marble is drawn. Identify whether the events are independent or dependent.

Accepted Answer

Independent

Answer

Dependent

Question 23

Two cards are drawn from a standard deck of cards and no cards are returned to the deck. Identify whether the events are independent or dependent.

Accepted Answer

Dependent

Answer

Independent

Question 24

Which of the following situations is represented by this tree diagram?

Accepted Answer

3 shirt options, 2 pants options, and 2 shoe options

Answer

3 shirt options, 6 pants options, and 12 shoe options

Answer

2 shirt options, 3 pants options, and 1 shoe option

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