Probability EOG Review

Rolling an ODD number on a number cube is:

• likely
• neither likly nor unlikely
• unlikely
• certain

Suppose each of the following is the result of tossing a coin.  Which result has the probability of 40% heads? 

• heads, heads, tails, tails, heads
• tails, heads, tails, tails, tails
• tails, heads, heads, tails, tails
• heads, tails, heads, heads, heads

Which value indicates the greatest likelihood of an event occurring?

• 1/2
• 0.32
• 5/8
• 0.49

Jairo tossed a fair coin 8 times and got heads every time.  What will happen on the next toss of this coin?

• He will definitely toss heads.
• He will definitely toss tails.
• He is more likely to toss heads than tails.
• A.  He is equally likely to toss heads or tails.

Each of the six faces of a certain cube is labeled either A or B.  When the cube is tossed, the probability of the cube landing with side A face up is 2/3.  How many faces are labeled A?

• 5
• 4
• 3
• 2

A fair number cube has sides numbered 1 through 6. When the cube is rolled 100 times, which would be MOST likely to occur?

• All the numbers rolled would be odd.
• The number 6 would never be rolled.
• The number 7 would be rolled at least once.
• An even number would be rolled 50 times.

Sarah will toss a fair coin 3 times. The possible results are illustrated in the tree diagram. Based on the information given in the tree diagram, in how many ways (outcomes) can Sarah toss
at least 2 tails?

• 2
• 3
• 4
• 5

Brenda spins this spinner twice.  What is the probability that the  sponner lands on red both times?

• 1/6
• 1/9
• 2/3
• 1/3

Erin has a bag with 7 red jelly beans and 3 black jelly beans. She will randomly select one jelly bean at a time from her bag and eat it. If the first jelly bean she selects is black, what is the probability that the second jelly bean she selects will also be black?

• 1/5
• 2/9
• 3/7
• 3/10

Probability can be written as a 

• fraction
• decimal
• percent
• all of the above