Practice with Probability Period 7

There are 2 red balls, 3 yellow balls and 4 green balls in a bag. If a ball is drawn in random, what is the probability that the ball drawn is red?

• 2/9

• 1/3

• 2/3

• 0

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

• 1/7

• 2/7

• 3/7

• 1

If one letter is chosen at random from the word TRUSTWORTHY, what is the probability that the letter chosen is a consonant?

• 2/9

• 7/9

• 8/11

• 9/11

If you choose from the following M & M colors, what is the probability that you choose blue?
5 green
6 yellow
8 blue
7 brown

• 8/26
• 4/13
• 8/25
• 1/3

P(not A) = 
*Remember to simplify.*

• 6/8
• 3/4
• 2/8
• 1/4

If you are playing Twister, what s the probability of spinning a red spot?

• 4 out of 16
• 8 out of 16
• 4 out of 12
• 1 out of 2

There are 14 tiles with one letter from the word MATHEMATICIANS on each. You are now going to choose a letter, put it back and then choose another letter. Find the probability of choosing the letter A, and then A again.

• 3/14

• 6/14

• 9/196

• 6/196

A bag contains 8 blue marbles, 7 green marbles, and 5 yellow marbles. Suppose you drew one marble from the bag above, replaced it and then drew a second marble. What is the probability of drawing a green, and then a blue marble. P(green, blue)

• 4/5

• 43/400

• 15/20

• 7/50

What is the probability of drawing the angel emoji card, replacing it, and drawing the laughing emoji card?

• 1/16

• 1/64

• 9/16

• 1/32

Ricardo has the spinner pictured here and a bag of marbles filled with 2 red marbles, 3 green marbles, and 3 blue marbles. What is the probability that Ricardo spins red on the spinner and picks a red marble out of the bag?

• 1 ⁄ 16
• 1 ⁄ 2
• 1 ⁄ 4
• 1 ⁄ 8