Kristina Karganova invites 15 relatives to a party: her mother, 3 aunts, 3 uncles, 4 brothers, 1 male cousin, and 3 female cousins. If the chances of any one guest arriving first are equally likely, find the probabilities that the first guest to arrive is as follows. (a) A brother or an uncle (b) A brother or a cousin (c) A brother or her mother ... (a) Find the probability that the first guest to arrive is a brother or an uncle. (Type an integer or a simplified fraction.) (b) Find the probability that the first guest to arrive is a brother or a cousin. 0 (Type an integer or a simplified fraction.) (c) Find the probability that the first guest to arrive is a brother or her mother. (Type an integer or a simplified fraction.)

Mrs. Hiatt puts the names of all 15 of her second period students on popsicle sticks and places them in a jar.  When she wants to call on someone, she chooses a popsicle stick.  She always replaces the popsicle stick before she draws another name.  If Mrs. Hiatt chooses two students while checking homework, what is the probability that James will be called on at least once?

Airline A is on time 80% of the time, Airline B is on time 85% of the time, and Airline C is on time 90% of the time. Airline A has twice as many flights as Airline B, and Airline B has three times as many flights as Airline C. One flight is selected at random from one of these airlines. (a)  What is the probability this flight on time? (b) Given that the flight is on time, what is the probability it is from Airline A?

Kristina Karganova invites 17 relatives to a party: her mother, 4 aunts, 3 uncles, 4 brothers, 1 male cousin, and 4 female cousins. If the chances of any one guest arriving first are equally likely, find the probabilities that the first guest to arrive is as follows. (a) A brother or an uncle (b) A brother or a cousin (c) A brother or her mother COD (a) Find the probability that the first guest to arrive is a brother or an uncle. (Type an integer or a simplified fraction.) (b) Find the probability that the first guest to arrive is a brother or a cousin.