Simple Probability
Complement & Predictions
Sample Space
Exp. vs. Theoretical
Compound events
Random
100
A bag has 5 red, 3 blue, and 2 yellow marbles. What is P(blue)?
3/10
100
The forecast shows a 45% chance of rain. What is P(no rain)?
55%
55/100 or 11/20
100
A coin is flipped and a 6-sided die is rolled. How many outcomes are in the sample space?
12
100
A coin is flipped 20 times and lands on heads 9 times. What is the experimental P(heads)?
9/20
100
A coin is flipped twice. What is P(heads, then heads)?
1/4
100
What country did the US declare independence from in 1776?
What was the date? (month/Day/year)
Who was the Commander-In-Chief of the Continental Army?
100 Points Each
Great Britain
July 4 1776
George Washington
200
The numbers 1–20 are placed in a bag. What is P(odd)?
1/2
200
P(red) = 1/4, P(blue) = 5/12 in a bag.
The rest are yellow.
What is P(yellow)?
1/3
200
A student picks a sandwich (turkey, ham, or veggie) and a drink (water or juice). How many meal combos are possible?
6
200
A 6-sided die is rolled once. What is the theoretical P(rolling a number greater than 4)?
1/3
200
A die is rolled twice. What is P(rolling a 2, then a 5)?
1/36
200
What is the name of the imaginary line that divides Earth into Northern and Southern Hemispheres?
Equator
300
The letters in the word FLORIDA are drawn randomly. What is P(vowel)?
3/7
300
Numbers 1–15 are in a bag. What is P(not divisible by 5)?
4/5
300
A coin is flipped twice. How many outcomes include at least one tail?
3
300
A 4-section spinner is spun 40 times; blue appears 14 times. What is the experimental P(blue)?
7/20
300
A bag has 3 red and 7 blue marbles. A marble is drawn, replaced, then another drawn. What is P(red, then red)?
9/100
300
How many bones are in the human body?
400
A class has 8 boys and 12 girls. One student is picked at random. What is P(boy)?
2/5
400
In a class of 30, P(soccer player) = 2/5. How many students do NOT play soccer?
18 students
400
Joy can ride the bus, walk, or carpool on Monday and Tuesday. How many outcomes are in the sample space?
9
400
A display has 3 mystery, 4 biography, 6 sci-fi, and 2 dystopian books. What is the theoretical P(sci-fi)?
2/5
400
A bag has 4 red, 3 blue, and 3 green marbles. One is drawn WITHOUT replacement, then another. What is P(red, then green)?
2/15
400
What number is the Roman numeral XL?
40
500
A standard deck has 52 cards. What is P(drawing a face card — jack, queen, or king)?
3/13
500
A bag has 4 red, 5 green, 3 white marbles. A marble is drawn and replaced 60 times. How many draws would you expect to be NOT red?
40 times
500
A pizza shop has 3 sizes, 2 crust types, and 4 toppings. How many different one-topping pizzas are possible?
24
500
In 50 draws (with replacement), green is drawn 35 times. Based on experimental probability, predict how many green marbles would be in a bag of 40.
28 green marbles
500
A box has 5 chocolate, 2 vanilla, and 3 strawberry candies. One is picked WITHOUT replacement, then another. What is P(vanilla, then chocolate)?
1/9
500
What fruit has seeds on the outside?
