Probability Test Review - Using Formulas

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? Assume he does NOT put the jack back. 
(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. Sedlock 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

Mrs. Mullins is using a random number generator to call students. It uses the numbers 1-30. What is the probability that it will pick the number 8 two times in a row? 

• 8/100
• 1/15
• 1/900
• 1/8

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

• 9/16
• 3/4
• 9/144
• 5/16

Ms. Mullins is playing cards with her friend with a standard deck of 52 cards. She needs to draw an Ace. What is the probability that she does NOT get the ace? (Hint: There are 4 aces in a deck)

• 1/4
• 1/13
• 12/13
• 48/52

Of 150 random customers, 52 ordered chocolate, 78 ordered vanilla, and the rest ordered strawberry. Based upon the results, how many of the next 75 customers would you expect to order strawberry?

• 10
• 20
• 40
• 65

There are 5 vowels in the alphabet. How many vowels should you get if you randomly chose a letter from all 26 letters 78 times? (Hint: Set up a prediction ).

• 5/26
• 15
• 19
• 18

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

The number cube was rolled 50 times. How many times theoretically would you expect to see a 6?

• About 1

• About 6

• About 8

• About 10