What are the requirements that must be satisfied for a sample to be random? Check all that apply. a. Each individual has an equal chance of being selected. b. The proportions of all subgroups in the sample are equal to their proportions in the population. c. If more than one individual is selected, the probabilities stay constant for each individual selected. d. The sample is drawn without replacement.

Exclude leap years from the following calculations. (a) compute the probability that a randomly selected person does not have a birthday on october 4. (type an integer or a decimal rounded to three decimal places as needed.) (b) compute the probability that a randomly selected person does not have a birthday on the 1st day of a month. (type an integer or a decimal rounded to three decimal places as needed.) (c) compute the probability that a randomly selected person does not have a birthday on the 30th day of a month. (type an integer or a decimal rounded to three decimal places as needed.) (d) compute the probability that a randomly selected person was not born in january. (type an integer or a decimal rounded to three decimal places as needed.)