Simple Events Probability

Cindy owns 7 t-shirts, 2 of which are gray. If Cindy randomly selects a t-shirt to wear, what is the probability it will be gray?

• 2/7

• 5/7

• 7/7

• 1/7

The letters that form the word ALGEBRA are placed in a bowl. What is the probability of choosing a letter other than “A”? 

• 2/7

• 5/49

• 5/7

• 10/49

What is P(heads)?

• 50%

• 1%

• 25%

• 100%

What is P(5)?

• 3/1

• 3/4

• 1/4

• 1

Gabby is picking out fabric for her bedroom. She has 20 fabric samples, and 8 of them are plaid. What is the probability that a randomly selected fabric sample will be plaid?

• 12/20

• 2/5

• 1/20

• 20

There are 18 dogs at the dog park on a busy Saturday. 4 of them are Yorkshire terriers. What is the probability that a randomly selected dog is a Yorkshire terrier?

• 2/9

• 9/2

• 1/4

• 1/5

Earl Darenz is asked to choose a day from a week. What is the probability of choosing a day which starts with S.

• 1/7

• 2/7

• 2/3

• 1/3

Of the people attending a seminar, 3 have gray hair and 30 do not. What is the probability that a randomly selected person will have gray hair?

• 1/10

• 30/3

• 5/30

• 3/5

The letters that form the word MATHEMATICS are placed in a bowl. What is the probability of choosing a "M"?

• 8/121

• 4/11

• 2/11

• 4/121

What is the probability of spinning red?

• 0

• 1/2

• 3/4

• 1