Probability

Lynn has a package of candy that contains 1 blue piece, 3 red pieces, 6 yellow pieces, and 8 green pieces. She randomly selects a piece of candy from the package. What is the probability that she selects a yellow piece of candy?

Tags

CCSS.7.SP.C.7B

A bag contains 14 green marbles, 16 white marbles, 21 black marbles, 10 red marbles, 20 yellow marbles, 15 orange marbles, 13 purple marbles, and 15 blue marbles. There are no other marbles in the bag. Nathan randomly selects one marble from the bag. Which statement best describes the likelihood of the color of the marble Nathan selects?

• A) The most likely color is green; the least likely color is blue.

• B) The most likely color is black; the least likely color is red.

• C) The most likely color is orange; the least likely color is blue.

• D) The most likely color is black; the least likely color is yellow.

Tags

CCSS.7.SP.C.5

There are 12 colored marbles in a basket. Of the 12 marbles, 2 of the marbles are red, 4 are purple, 3 are blue, and 3 are orange. Randy will randomly draw a marble out of the basket. What is the probability that Randy will pick a purple marble?

Tags

CCSS.7.SP.C.7B

A car license plate has 3 numbers ranging from 0–9, followed by 3 letters ranging from A–Z. What is the approximate probability that no number or letter is the same as any other on the plate?

• 0.035

• 0.038

• 0.639

• 0.648

Tags

CCSS.HSS.CP.B.9

Mack rolls a fair six-sided die 5 times. The results are shown. 4, 4, 6, 6, 4. What is the approximate probability that his next roll is 3 or less?

• 75%

• 50%

• 33%

• 17%

Tags

CCSS.7.SP.C.6

Marcus has unpaired socks of three different colors in a drawer: 10 gray, 6 blue, and 16 black. He pulls 1 gray sock from the drawer. He picks the next sock at random. What is the approximate probability that it is also gray?

• 0.28

• 0.29

• 0.31

• 0.32

A list of 10 numbers contains 6 prime numbers. What is the probability that a prime number will be randomly selected from the list?

Tags

CCSS.7.SP.C.7B

The zoo has 4 tigers, 3 lions, and 6 leopards. Each evening, these animals are fed inside a big barn. One evening, a leopard enters the barn first. The remaining animals enter the barn in a random order. What is the probability that the second animal to enter the barn was a lion?

Tags

CCSS.HSS.CP.B.9

Shoppers can buy a randomly chosen mystery coupon for $5. The coupon's discount amount is revealed only when the shopper is ready to pay. At that time, the discount amount is applied to the total purchase. The available quantity of each type of coupon and the corresponding discount amounts are shown in the table.

Mystery Coupons

Discount Amount Available Quantity

5% off 46

20% off 3

30% off 1

Marcia's purchase total is $24. What is the probability that buying a mystery coupon would save her more money than choosing not to buy one?

• 1%

• 2%

• 4%

• 8%

A student has a set of cards. Each card has a picture of one shape. The table shows the number of cards that have a picture of each shape. The student will randomly select one card from the set. Use the drop down menu to write a true statement.

The probability of selecting a card with a picture of a circle is ____,

(a)  

• 1/5
• 4/5

• 8/40

Tags

CCSS.7.SP.C.7B