Yr 10 Probability Revision

What is the probability of rolling a number less than 1 on a regular 6-sided die?

• 0

• 1

• 1/2

• 6

Tags

CCSS.7.SP.C.5

A regular 6-sided die is rolled 48 times. How many times would you expect to roll a 2?

• 96

• 24

• 2

• 8

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.6

CCSS.7.SP.C.7

A jar contains 2 pink, 6 red, and 4 blue marbles. If you pick one marble without looking, what is the probability that the marble you pick will be red or blue?

• 5/6
• 1/2
• 1/3
• 1/6

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

P(not A) = 
*Remember to simplify.*

• 6/8
• 3/4
• 2/8
• 1/4

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

Describe the likelihood of an event with the probability of 1.

• certain to happen

• impossible to happen

• unlikely to happen

• equally likely as not to happen

Tags

CCSS.7.SP.C.5

Describe the likelihood of an event happening that has the probability of one-half.

• certain to happen

• impossible to happen

• equally likely as not to happen

• likely to happen

Tags

CCSS.7.SP.C.5

A spinner is spun and then a fair coin is tossed. The experiment was repeated a number of times. Below are the results.

red, heads = 4 times

red, tails = 3 times

blue, heads = 5 times

blue, tails = 3 times

What is the probability the result will be red, tails the next time the experiment is repeated?

• one-fifth

• three-tenths

• two-fifteens

• one-third

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.6

CCSS.7.SP.C.7

Two dice are rolled and it is recorded whether the result on each is odd or even. What is the probability that one is even and one is odd?

• 1/2

• 1/4

• 3/4

• 1/3

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

CCSS.7.SP.C.8

A box contains 3 brand A batteries and 7 brand B batteries. 30% of brand A batteries are faulty and 40% of brand B batteries are faulty. A battery is selected at random and then checked to see if it is faulty. What is the probability that a not faulty brand A battery is selected?

• 0.21

• 0.09

• 0.28

• 0.25

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

CCSS.7.SP.C.8

In a box are 3 red pens, 4 black pens and 2 green pens. You pick a pen at random and then put it back. Your friend then picks a pen. What is the probability you both pick the same clour?

• 29/81

• 9/81

• 3/9

• 2/9

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

CCSS.7.SP.C.8