Basic Concepts of Probability

It is to predict how likely events are to happen

• Event

• probability

• sample space

• outcome

A spinner has 4 equal sectors colored red, yellow, green and blue. What is the chance of landing on blue after spinning the spinner once?

• The chance of landing on blue is 1 in 4, or one-fourth

• The chance of landing on blue is one-half

• The chance of landing on blue is 1 in 6, or one-sixth

• The chance of landing on blue is 1 in 8, or one-eighth

In rolling a pair of dice, how many would be the sample space?

• 6

• 1

• 12

• 36

• Q

• S

• P

• R

Match the following

• List of all possible outcomes

• Certain

• The likelihood of an event

• Probability

• Has a probability of 1

• Impossible

• Has a probability of 1/2

• Sample Space

• Has a probability of 0

• Equally Likely as Unlikely

A card is taken at random from my full pack of 52 playing cards. What is the probability that it is a red card?

• ½

• 1/13

• 1/26

• 5/13

A packet of sweets contains 18 red sweets, 12 green sweets and 10 yellow sweets. A sweet is taken at random from the packet. What is the probability that the sweet is red?

• 18/40

• 7/10

• 22/40

• 9/17

A spinner has 4 equal sectors colored red, yellow, green and blue. What is the set of all possible outcomes in this experiment?

• S={ Red, Yellow, Green and Blue }

• S={ Green and Blue }

• S={ Yellow, Green and Blue }

• S={ Red}

What is an example of an experiment?

• S={1,2,3,4,5,6}

• The chance of landing on 4 is one-sixth

• A two-faced coin is tossed

• Landing on head

Earl is asked to choose a day from a week. What is the probability of choosing a day which starts with S?