Basic Probability Quiz

Probability can be expressed as a number between_____ and _____.

• 0 and 100
• 0 and 10
• 0 and 1
• -1 and 1

Tags

CCSS.7.SP.C.5

Probability can be written as ...

• a fraction
• a decimal
• a percent
• all of the above

Tags

CCSS.7.SP.C.5

Consider a simple event, like flipping a coin or rolling a die. There are several different outcomes, each with some probability.

What is the sum of the different probabilities for a given event? Hint: it's always the same.

• 50%

• 100%

• 200%

• 400%

Answer explanation

The sum of all the outcomes of an event MUST be 100%, because one of the possibilities must occur.

For example, when flipping a coin, heads is 50% likely and tails is 50% likely. 50% + 50% = 100%, which makes sense - when you flip the coin, one of those two things MUST happen.

What is the probability of spinning the spinner and landing on the 7?

• 1 out of 2

• 7 out of 8

• 1 out of 8

• yellow out of blue

Tags

CCSS.7.SP.C.7A

What is the probability of spinning an odd number?

• 1 out of 6

• 1 out of 2

• 1 out of 1

• 1 out of 0

Answer explanation

There are 3 odd numbers and 6 numbers total. So, the probability of spinning an odd numbers is 3 out of 6, which is the same as 1 out of 2.

Tags

CCSS.7.SP.C.7A

An event with a probability of 100% is:

• never going to happen

• certain to happen

• unlikely to happen

• probably going to happen

Answer explanation

If something happens with 100% probability, it is CERTAIN to happen. For example, if you throw a ball in the air, the probability that it will land is 100%.

Tags

CCSS.7.SP.C.5

What is the probability of rolling a die and having it land as a six?

• 1/6

• 5/6

• 1/3

• 1/2

Answer explanation

'Die' is the singular of 'dice,' but for some reason, 'mie' is not the singular of 'mice.'

Tags

CCSS.7.SP.C.7A

The probability of it raining today is 30%.  What is the probability that it will NOT rain?

• 30%
• 70%
• 100%
• 0%

Tags

CCSS.7.SP.C.5

A bag has 4 green marbles, 3 red marbles, 2 blue marbles, and one yellow marble. If you select one marble at random, what are the chances that it is blue?

• 3/10

• 2/10

• 2/4

• 2/6

Answer explanation

There are 2 blue marbles, and 10 total marbles. So, the probability of selecting a blue one is 2 out of 10.

Tags

CCSS.7.SP.C.7B

What is the probability of spinning green or blue?

• 0

• 5/12

• 1/2

• 3/4

Answer explanation

There are 6 green or blue spaces on the spinner, and 12 total spaces. So, the probability of spinning green or blue is 6 out of 12, or 1 out of 2.

Tags

CCSS.HSS.CP.B.7