8th Grade Probability

You pick a card at random from the set {5,6,7,8}. What is P(less than 8)?Write your answer as a percentage rounded to the nearest tenth.

(a)  

Tags

CCSS.7.SP.C.7B

You roll a 6-sided die. What is P(1 or greater than 1)? Write your answer as a fraction or whole number.

(a)  

Tags

CCSS.HSS.CP.B.7

A grocery store recently sold several cans of soup.

cream of mushroom | 2

chicken noodle | 40

minestrone | 7

lentil | 12

vegetable beef | 27

What is the experimental probability that the next can sold will be chicken noodle soup?

Write your answer as a fraction or whole number.

(a)  

Tags

CCSS.7.SP.C.6

At a science museum, visitors can compete to see who has a faster reaction time. Competitors watch a red screen, and the moment they see it turn from red to green, they push a button. The machine records their reaction times and also asks competitors to report their gender.

What is the probability that a randomly selected competitor reacted in less than 0.3 seconds and was female?

Write your answer as a simplified fraction

(a)  

Last month, Miguel stocked 75 oregano plants and 125 other herb plants at the garden center. Considering this data, how many of the next 584 herb plants stocked should you expect to be oregano plants?

(a)  

Tags

CCSS.6.RP.A.3D

You flip three coins. How many outcomes are possible?

(a)  

You roll a 6-sided die, pick a card from {1,2,3,4,5,6,7,8}, spin a fair spinner containing {7,8}, and find the sum. How many different sums are possible?

(a)  

Sasha picks a card at random. Without putting the first card back, she picks a second card at random. Are these two events dependent or independent?

• depenedent

• independent

• not enough information

• all of the above

Tags

CCSS.HSS.CP.A.5

You pick a card at random from the set {4,5,6,7}. Without putting the first card back, you pick a second card at random.

What is the probability of picking a 4 and then picking an even number?Write your answer as a fraction or whole number.

(a)  

Evaluate: 7!

(a)