Probability
A blue cube will be drawn from a bag containing only five blue and five black cubes.
Decide whether the above event is impossible, unlikely, equally likely to occur or not occur, likely, or certain to occur.
equally likely to occur or not occur
Rolling a 1 or 2 a when a 6-sided number cube with the numbers 1–6 on the faces of the cube is rolled. Is the following uniform or non-uniform probability?
Non-uniform
Jamir is conducting an experiment where she rolls a six-sided die. What is the sample space in this experiment?
1, 2, 3, 4, 5, 6
Which answer represents the probability of an event that is very likely to occur?
a. 0.12
b. 0.5
c. 0.91
d. 1.18
c. 0.91
Which is an example of non-uniform probability?
a) Flipping a fair coin, with sides labeled heads and tails, and the coin landing on heads
b) Choosing a marker out of a bag, with nine red markers and one green marker, and the marker being green
c) Spinning the arrow on a spinner, with four equal sections labeled one to four, and the arrow landing on three.
b) Choosing a marker out of a bag, with nine red markers and one green marker, and the marker being green
What is the sample space for a bag of marbles with 28 white marbles, 10 black marbles, 7 striped marbles and 13 clear marbles inside?
white, black, striped and clear
Which of the following could represent the probability of an event occuring? Select all
that apply.
A. 168%
B. 5/8
C. 1.32
D. 23%
E. 0.59
F. 16/6
B. 5/8
D. 23%
E. 0.59
Selecting a black or an orange marble from a bag containing black and orange marbles. Which type of probability is this?
Uniform probability
Jordan has a spinner that is split into four equal sections: pink, blue, purple, and yellow.
Jordan spun the spinner 760 times. Which of the following would be a good estimate of the number of times the spinner lands on the yellow section?
A. 190 times
B. 253 times
C. 380 times
D. 3,040 times
A. 190 times
The spinner has 8 equal-sized sections, each labeled 5, 6, 7, or 8. One section is labeled 5, three sections labeled 6, two sections labeled 7 and two sections labeled 8.The arrow on the spinner is spun.
What is the probability of the arrow stopping on a section labeled with a 6?
3/8
You roll a six-sided die labeled 1-6. Which answer choice below represents uniform probability?
a) Rolling a multiple of 2 and rolling a multiple of 3
b) Rolling a number greater than 5 and rolling a number less than 4
c) Rolling an even number and rolling an odd number
d) Rolling a number divisible by 6 and rolling a number divisible by 2
c) Rolling an even number and rolling an odd number
Which event is most likely to occur?
A. Flipping a fair coin, with sides labeled heads and tails, and the coin landing on tails.
B. Rolling a fair number cube, with faces labeled one to six, and the cube landing on a number less than six.
C. Choosing a marble out of a bag, with nine blue marbles and one red marble, and the marble being red.
D. Spinning the arrow on a spinner, with four equal sectors labeled one to four, and the arrow landing on a number greater than one.
B. Rolling a fair number cube, with faces labeled one to six, and the cube landing on a number less than six.
The spinner shown is divided into 10 equal sections, numbered 1-10. An arrow on this spinner is spun once.
What is the probability that the arrow will land on a section with a value of atleast 3?
A. 9/9
B. 4/5
C. 2/4
D. 4/10
B. 4/5
Ms. Morgan is selecting the Dress Out Day winners for this month’s raffle. Each homeroom earned tickets by having everyone complete a survey. The number of raffle tickets per homeroom in the 7th grade is shown below.
7.1 Cohort- 4 tickets
7.2 Cohort- 2 tickets
7.3 Cohort- 2 tickets
7.4 Cohort- 5 tickets
Jaylen says 7.4 Cohort has a 1/4 chance of winning. Do you agree or disagree? Why?
Disagree, this is not a uniform probability. There is not an equal chance for them to get selected.
Kiana spins a spinner with 1/2 blue, 1/4 red, 1/8 green and 1/8 purple. If she spins it 32 times. Which set of outcomes is most likely to occur?
A. 8 blue, 8 red, 8 green, 8 purple
B. 26 blue, 2 red, 2 green, 2 purple
C. 14 blue, 10 red, 6 green, 2 purple
D. 16 blue, 9 red, 3 green, 4 purple
D. 16 blue, 9 red, 3 green, 4 purple