Question

A number cube is rolled 160 times. The number 2 comes up 39 times. What is the experimental probability of rolling a 2? What is the theoretical probability of rolling a 2?

A. 39/160; 1/80
B. 1/6; 39/160
C. 39/160; 1/6
D. 121/160; 1/6

Answer 1

@jim_thompson5910 @Hero

Answer 2

When the die is rolled, "2" comes up 39 times

this is out of 160 times

so the experimental probability is __________ (fill in the blank)

Answer 3

39 out of 160?

Answer 4

I'm confused. what about the theoretical probability.

Answer 5

experimental probability is just the results of the experiment: you rolled 160 times, and got 2 39 times.

theoretical probability is what you would expect if you rolled "enough" times with a perfectly fair die. you have 6 sides, all of which should be equally probable, so the theoretical probability would be...

Answer 6

1/6?

Answer 7

so the answer is C?

Answer 8

@jim_thompson5910

Answer 9

yes the theoretical probability is where you assume each side has an equal chance of being landed on

there are 6 sides and only one side is labeled '2'

so P(rolling a 2) = 1/6 is the theoretical probability

Answer 10

the theoretical probability is something you come up with without actually doing the experiment. You just make a theory

the experimental probability is you actually out in the field doing the experiment and collecting data

ideally the experimental probability would be close to the theoretical probability given enough trials. if not, then perhaps the theoretical probability would have to be adjusted

Answer 11

Thank you so much I get it now