Simple Event & Complements
3% of Americans are vegan. If you are to ask a random person whether he or she is a vegan, what is the probability that the person is NOT a vegan?
97/100 or 97%
Pat's Pizza made 21 cheese pizzas, 14 veggie pizzas, 23 pepperoni pizzas, and 14 sausage pizzas yesterday. Based on this data, what is a reasonable estimate of the probability that the next pizza made is not a cheese pizza?
A. 51%
B. 66%
C. 71%
D. 81%
C.71%
Asia has 5 pink bows, 1 blue bow, and 4 purple bows in a box. She will randomly choose 1 bow from the box. What is the probability Asia will choose a purple bow?
A. 1/2
B. 2/5
C. 1/10
D. 3/5
B. 2/5
Choose a number between 1 and 25. What is the probability that it is an even number?
12/25 or 48%
A spinner with 6 equal sections, labeled 1-6 is used. What is the probability of spinning a number greater than 4?
A. 1/6
B. 2/3
C. 1/2
D. 1/3
D. 1/3
A deck of cards contains red, orange, yellow, and green cards. For each color, there are 10 cards labeled 0 through 9. What is the probability of randomly selecting a red car, replacing the card, and then randomly selecting a card labeled 0?
A. 1/40
B. 1/20
C. 13/40
D. 7/20
A. 1/40
A survey showed that 8 out of 20 homeowners in a neighborhood had cable television. If there were 320 homeowners in the neighborhood, how many could be expected to have cable television?
A. 40
B. 256
C. 312
D. 128
D. 128
JuJu has a bag of coins. The bag contains 10 dimes, 5 nickels, and 1 penny. She will randomly select 2 coins from the bag at one time without replacement. What is the probability that JuJu will select a dime first and then a penny?
A. 83/120
B. 11/16
C. 5/128
D. 1/24
D. 1/24
A spinner is divided into congruent sections that are labeled from 1 through 7. If the spinner is spun one time, what is the probability of the arrow NOT landing on a section labeled with an odd number?
a. 4/7
b. 3/4
c. 1/4
d. 3/7
d. 3/7
A deck of cards contains 12 cards with letters and 16 cards with numbers. A card is pulled from the deck and replaced. This process is carried out 14 times. What is a reasonable prediction for the number of times a card with a letter should be chosen?
A. 10
B. 2
C. 6
D. 12
C. 6
A bag contains flavored lollipops. A lollipop will be randomly selected from the bag.
- 17 lollipops are grape flavored
- 8 lollipops are cherry flavored
-14 lollipops are watermelon flavored
-16 lollipops are strawberry flavored
What is the probability in decimal form that the selected lollipop will be either cherry flavored or watermelon flavored?
0.4
Tara has two bags of marbles. The first bag contains 6 red marbles, 5 blue marbles, and 4 green marbles. The second bag contains 3 red marbles, 2 blue marbles, and 4 green marbles. Tara will randomly select 1 marble from each bag. What is the probability that Tara will select a blue marble from each bag?
a. 5/9
b. 1/135
c. 1/6
d. 2/27
d. 2/27
A study of a population of 1,200 frogs revealed that 12 out of every 180 frogs in the population have spots on their back. Based on the results of this study, how many frogs in the population do NOT have spots on their back?
D. 1,120
Kayden has 50 pictures in an album. Of these pictures, 30 show his friends, 12 show his family, and 8 only show Kayden. Justin is in 50% of the pictures that show his friends and 50% of the pictures that show his family.
Based on this information, which statement is true?
A. The probability of selecting a picture that shows Kayden with his friends is greater than the probability of selecting a picture that shows Kayden with his family.
B. The probability of randomly selecting a picture that shows Kayden is 8%.
C. The probability of selecting a picture that shows Kayden with his family is 5 times the probability of selecting a picture that shows only his friends.
D. The probability of selecting a picture that does not show Kayden is 21%
A. The probability of selecting a picture that shows Kayden with his friends is greater than the probability of selecting a picture that shows Kayden with his family.
Barrett has a 12-sided die numbered from one to twelve is rolled once. What is the probability the die will land on a number divisible by 3?
A. 66.66%
B. 33.33%
C. 50%
D. 25%
B. 33 1/3%