Probability

A bag contains 2 blue marbles, 3 black marbles, and 5 red marbles. If Mrs. Grow pulls two marbles without replacement, what is the probability of them both being blue? 

• 1/45
• 1/5
• 1/20
• 2/5

Each of the letters in MATHEMATICS are on separate cards, face down on a table.  If you pick a card at random, and then another card without replacement what is the probability that both card will be a vowel? 

• 4/11
• 16/121
• 7/21
• 6/55

A magician is doing a card trick using a standard deck of cards. What is the probability that he will pull a jack, followed by a queen?
(Hint: there are 4 jacks and 4 queens in the deck of 52 total cards)

• 1/13
• 4/663
• 4/13
• 1/104

A bag contains ten black bows, twenty white bows, and 5 grey bows. If Ms. Townley picks one without looking, what is the probability she chooses a black, white, and grey bow? Assume she puts the bow back each time. 

• 8/343
• 35/100
• 4/257
• 3/49

Tags

CCSS.7.SP.C.7B

You roll a six sided die. What is the probability of rolling an even number three times in a row? 

• 3/100
• 1/2
• 1/6
• 1/8

A bag contains 5 blue marbles, 4 red marbles, and 3 orange marbles. Mrs. Cox picks one without looking, replaces it and picks another one. What is the probability that she picks two that are not orange? 

• 9/16
• 3/4
• 9/144
• 5/16

How many outfits are possible with 5 pairs of jeans, 8 t-shirts, and 2 pairs of shoes?

• 15
• 40
• 80
• 10

You are about to take 6 question test. Each question has 4 possible answer choices. How many ways can you answer the test if you answer each question?

• 4096
• 24
• 1296
• 10

A box contains 5 purple marbles, 3 green marbles and 2 orange marbles. Draws are made without replacement. P(orange AND green).

• 1/15
• 2/15
• 3/31
• 1/5

Suppose you write the numbers 1 to 10 on separate index cards. You randomly choose one card, place it back in the set, and then randomly choose another card. What is the probability that the first card you choose has a 1 on it or the second card has a 2 on it?

• 1/5
• 2/5
• 1/100
• 19/100

Tags

CCSS.HSS.CP.B.7