Independent or Dependent?
Tree Diagrams
Independent Questions
Dependent Questions
Common Sense
100

Rolling a dice and drawing a random card from a Standard Deck

Independent 

100

A soccer coach has received some new sweaters and shorts for their soccer team to wear. The colour of the sweaters are yellow, green and blue, while the shorts are black, red and brown. How many options are there? 

9 Options 

100

What is the probability of getting a Head when tossing a coin?

1/2

100

Three cards are drawn from a Standard Deck and not replaced. What is the probability of drawing three black cards? 

2/17 

100

In a group of 56 people, 43 people like gummy candy while 39 people like chocolate. How many people like both? 

26 people

200

Choosing a card from a Standard Deck, not replacing it and choosing another card 

Dependent 

200

A baseball team has 7 pitchers and 3 catchers. How many batteries consisting of a pitcher and a catcher can the coach select? 

8 Batteries 

200

In a bag there are 12 balls: 4 red, 3 yellow, 2 blue and 3 green. If a ball is chosen, returned to the bag and then another ball is chosen, what is the probability of two blue balls? 

1/36

200

In a shipment of 20 computers, 3 are defective. Three computers are randomly selected and tested. What is the probability that all three are defective if the first and second ones are not replaced after being tested?

1/1140

200

In a class, 17 students enjoy baking while 12 students enjoy hiking. If 4 students like both, how many students are in the class? 

25 students

300

Its raining, so the parade was cancelled 

Dependent

300

You are off to soccer, and love being the Goalkeeper, but that depends who is the Coach today: with Coach Sam the probability of being Goalkeeper is 0.5; with Coach Alex the probability of being Goalkeeper is 0.3. Sam is Coach more often, about 6 out of every 10 games (a probability of 0.6).

So, what is the probability you will be a Goalkeeper today?

 42% chance

300

A box contains 12 balls: 3 black, 4 blue and 5 green. A ball is chosen from the box, replaced and another one is chosen. What is the probability that ones of the balls drawn is black and the other is green? 

5/24

300

A card is drawn from a Standard Deck, not replaced and another card is drawn. What is the probability of two Jacks being drawn? 

1/221

300

A survey determines that 32% of a population enjoys Indian food, while 45% enjoy Chinese Takeout. If 37% of the population likes neither, what is the percentage that someone will like both? 

14% 

400

You vote for a Liberal representative, I vote for a Green Party representative 

Independent

400

A bag contains 3 black balls and 5 white balls. Paul picks a ball at random from the bag and replaces it back in the bag. He mixes the balls in the bag and then picks another ball at random from the bag. Calculate the probability that Paul picks a black ball in his second draw

3/8

400

What is the probability of getting a 4 or 6 when rolling a die?

1/3

400

Three cards are chosen at random from a deck of 52 cards without replacement. What is the probability of choosing 3 aces?

1/5,525

400

There are 5 people in the Smith Family; two parents are their three kids. If you go to visit them, how many possible combinations might you find them at home? 

32 combinations

500

You take a ball out of a bag, don't replace it and take another ball 

Dependent 

500

A box contains 4 red and 2 blue chips. A chip is drawn at random and then replaced. A second chip is then drawn at random. Calculate the probability of getting at least one blue chip 

5/9

500

When a coin is tossed and a six-sided dice is rolled, what is the probability of a Head and a Prime Number? 

1/4

500

A card is chosen at random from a standard deck of 52 playing cards. Without replacing it, a second card is chosen. What is the probability that the first card chosen is a queen and the second card chosen is a jack?

4/663 

500

The probability of having attached earlobes is 0.56, and the probability of of being double-jointed is 0.24. If 7% of the population has both, what is the chance of a person having neither? 

27%