Probability STAAR Review

Sovann spins a spinner that is split into 10 equal sections.  The sections are labeled 3,1,2,3,2,3,1,2,3,3.  What is the probability that the spinner will land on the number 1?  

• 1/10

• 1/5

• 3/10

• 1/2

A bag contains 3 red marbles and 2 yellow marbles.  What is the probability of drawing a red marbles, then drawing a red marble again after replacing the first marble?  

• 6/25

• 3/10

• 9/25

• 3/5

Sammy has a bag with 3 white marbles, 4 yellow marbles, and 5 green marbles.  What is the probability of drawing a white marble followed by a yellow marble, without replacing the white marble? 

• 1/4

• 1/12

• 1/11

• 7/12

Emily spins a spinner divided into 5 equal sections.  Two sections are blue, two are green, and one is white.  Which is most likely? 

• Emily will spin white.

• Emily will spin white or green.

• Emily will spin blue or green. 

• Emily will spin green. 

A travel club has 3,000 members. A random sample of 50 of the club members found that 12 people like mountain vacations best. Which statement is NOT supported by the sample data?

• Twenty-four percent of those sampled say they like mountain vacations best.

• An estimated 720 club members would likely say they enjoy mountain vacations best.

• Almost one-quarter of club members would likely say they enjoy mountain vacations best.

• More than 2,500 club members would likely say they prefer other vacations over mountain vacations.

A quality control inspector at a clothing manufacturer is checking to make sure collars on shirts are sewn correctly.  Twenty shirts are randomly chosen and 3 have defective collars.  Shirts that are defective are discarded.  Based on this sample, how many shirts do you predict are likely to be discarded in a week when 500 shirts are produced? 

• 17

• 20

• 75

• 425

Parents at a middle school were randomly selected to participate in a survey.  Forty-Two out of 60 parents who were surveyed support a proposal to buy new computers.  There are 456 parents with students at the middle school.  Predict how many of these parents are likely to support the proposal. 

• 42 parents

• 70 parents

• 137 parents 

• 319 parents

Tags

CCSS.6.RP.A.3B

A refrigerator holds a variety of drinks. One drink will be selected randomly. The contents of the refrigerator are shown in the table below. What is the probability of selecting either soda or juice?

• 2/5

• 3/5

Graysen has a green number cube and a white number cube. The faces of the cubes are numbered 1 through 6. Graysen will roll each cube one time. What is the probability that the green cube will land with an even number faceup and the white cube will land with a number greater than 2 faceup?

• 1/9

• 1/36

• 1/3

• 1/6

The manager of a music store surveyed a random sample of customers who shop in the store about their favorite type of music. The table shows the number of customers who selected each type of music. Based on the information in the table, which inference about the favorite type of music of all the customers who shop in the music store appears to be valid?

• They are certain to select rock or pop music.

• They are less likely to select country or rap music than rock music.

• They are more likely to select country music than jazz, classical, or rap music.

• They are certain to select any type of music other than jazz music.