Assume there is a 20% chance of an adult American suffering from a psychiatric disorder. Give answers accurate to four decimal places. (a) Find the probability that none of them them suffer from a psychiatric disorder.

b) Find the probability that exactly three of them suffer from a psychiatric disorder.

c) Find the probability that at least one of them suffers from a psychiatric disorder.

d) Find and interpret the mean of the random variable X where X is the number who suffer from a psychiatric disorder among for adult Americans.

Jackie bought a bag of oranges. she used 3/8 of the oranges to make orange juice. she used 1/3 of the oranges to make a fruit salad. she put 1/8 of the oranges in a bowl on the table. she put 2/12 of the oranges in the refrigerator. a) jackie left more oranges on the table than she put in the refrigerator. b) jackie used fewer oranges to make orange juice than she left on the table. c) jackie put fewer oranges in the refrigerator than she used to make the fruit salad. eliminate d) jackie used more oranges to make a fruit salad than she used to make orange juice.

If you answer right ill give brainliest, : )

If you prove that ∆wxz is congruent to ∆yzx, which general statement best describes what you have proved?