A spinner is divided equally into $5$5 sections, but $2$2 of them are colored white.
What is the probability of landing on white?
If the spinner is spun $685$685 times, how many times would you expect it to land on white?
$18$18 standard six-sided dice are rolled.
$260$260 standard six-sided dice are rolled.
If Maria rolls a die $48$48 times, how many $2$2s would she expect to come up?
Develop a probability model and use it to find probabilities of events; compare probabilities from a model to observed frequencies; and if the agreement is not good, explain possible sources of the discrepancy
a. Develop a uniform probability model by assigning equal probability to all outcomes, and use the model to determine probabilities of events. For example, if a student is selected at random from a class, find the probability that Jane will be selected and the probability that a girl will be selected.
b. Develop a probability model (which may not be uniform) by observing frequencies in data generated from a chance process. For example, find the approximate probability that a spinning penny will land heads up or that a tossed paper cup will land open-end down. Do the outcomes for the spinning penny appear to be equally likely based on the observed frequencies?