Probability Review

When the outcomes of an event are not equally likely to occur, this is called

• percent error

• uniform

• trials

• non-uniform

What is the probability of rolling a 7 on a die?

• 0

• 1/2

• 1/6

• 1

What is the probability of rolling an even number on a die?

• 0

• 1/2

• 1/6

• 1

Which of the following has a probability of 1?

• Selecting a heart from a deck of cards

• flipping a coin and getting heads

• rolling a dice and getting a number less than ten

• Jumping in the air and touching a star

Which of the following events are complementary?

• Rolling a 2 and Rolling an odd number

• Flipping two coins and both getting tails

• Picking a card red card from a deck and picking a black card from a deck

When finding the probability of flipping a coin, what is heads or tails known as?

• trials

• percent error

• sample space

• probability model

If we flip a coin 15 times, what does the 15 stand for?

• the sample space

• the number of trials

• the percent error

• the probability of getting a heads

The chance an event will occur. It can be written as a fraction, decimal or percent.

• odds

• sample space

• outcome

• probability

Event cannot happen

• neither likely nor unlikely

• unlikely

• impossible

• likely

Even chance of event happening as not happening

• unlikely

• equally likely

• certain

• impossible