Ok this is a lot of problems in one so here goes
1.Randy spins a spinner with sections labeled A, B, C, D, E, F, G, and H.
What is the number of possible outcomes?
What is the number of possible outcomes?
There are 8 possible outcomes, just count all the different outcomes that are available
2.When rolling a number cube with sides labeled 1 through 6, what is
the probability of rolling a number greater than 2?
Express your answer in simplest form.
the probability of rolling a number greater than 2?
Express your answer in simplest form.
Given that the dice will come up with each of the 6 numbers equally, ie it is a fair die, the outcomes of 3, 4, 5, & 6 are what you are looking for. That is 4 outcomes out of a possible 6 outcomes so the answer is 4/6 and if you reduce your fraction it is 2/3.
3.A spinner has three sections. The table shows the results of
spinning the arrow on the spinner 80 times.
Section 1 = 18
Section 2 = 30
Section 3 = 32
What is the experimental probability of the
arrow stopping over Section 3?
spinning the arrow on the spinner 80 times.
Section 1 = 18
Section 2 = 30
Section 3 = 32
What is the experimental probability of the
arrow stopping over Section 3?
The number of times that 3 appeared out of the total times you spun, so 32/80 and you can reduce that to 2/5
4.A bag contains 8 black marbles, 16 white marbles, 14
red marbles, and 10 green marbles. A marble is drawn at
random from the bag.
What is the probability that the marble drawn will not be white?
red marbles, and 10 green marbles. A marble is drawn at
random from the bag.
What is the probability that the marble drawn will not be white?
You have a total of 48 marbles and the non white ones total 32 so the probability is 32/48 simplified to 2/3
5.The table shows the results of rolling a number cube, with sides labeled 1 through 6, several times.
What is the experimental probability of rolling a 1 or a 5?
Express your answer in simplest form.
Outcome 1____2____3____4____5____6
________________________________________
Number of/
times \
outcome /
occurred \10____6____4____8____6____6
What is the experimental probability of rolling a 1 or a 5?
Express your answer in simplest form.
Outcome 1____2____3____4____5____6
________________________________________
Number of/
times \
outcome /
occurred \10____6____4____8____6____6
Your total rolls are 10+6+4+8+6+6 = 40
10+6 is the occurrences for 1 and 5 so that total over 40 would be your answer, 16/40 simplified to 2/5
I hope you are really understanding this and learning to do it yourself as we tutors will not be there at the test!
All the best
Lori
