Probability Basics Practice - 1

In a bag are 20 chips that are numbered 1 through 20. What are the odds of drawing a #3 or a #7 chip?

• 0.1

• 10

• 1 out of 40

• $\frac{1}{20}$

You have a coin and a die. What are the odds of flipping a coin and landing on tails, and then rolling the die and getting a 1?

• $\frac{1}{2}$
  

• $\frac{1}{12}$
  ​
  

• $\frac{1}{8}$
  ​
  

• $\frac{2}{12}$
  ​
  

Tags

CCSS.HSS.CP.B.7

What are the odds of flipping a coin three times and landing on heads every time?

There are 33 green marbles and 44 black marbles in a bag. You pull out one marble, set it down, and then reach in and grab a second. What are the odds you draw a black marble both times?

There are 44 purple marbles, 55 pink marbles and 44 blue marbles in a bag. You pull out one marble, set it down, and then reach in and grab a second. What are the odds you draw a purple marble and then a pink marble?

You flip a coin and then roll a fair six-sided die. What is the probability the coin lands heads-up and the die shows an even number?

There are 3 red t-shirts, 5 gray t-shirts, and 1 blue t-shirt in a clothing drawer. What are the odds of grabbing a red t-shirt if you pick at random?