Có 2 chuồng gà: chuồng I có 8 con mái, 4 con trống, chuồng II có 9 con mái, 3 con trống. a. Bắt ngẫu nhiên 3 con từ chuồng I. Hỏi trung bình có bao nhiêu con gà mái được bắt ra?
b. Bắt ngẫu nhiên 3 con từ chuồng II. Hỏi trung bình có bao nhiêu con gà mái được bắt ra?
c. Bắt ngẫu nhiên 3 con từ mỗi chuồng. Hỏi trung bình có bao nhiêu con gà mái được bắt ra?

Apath 3 m wide runs around the inside of a square park inside 60 m.find the area of the path.pls

Asays "we are both knaves" and b says nothing. exercises 24–31 relate to inhabitants of an island on which there are three kinds of people: knights who always tell the truth, knaves who always lie, and spies (called normals by smullyan [sm78]) who can either lie or tell the truth. you encounter three people, a, b, and c. you know one of these people is a knight, one is a knave, and one is a spy. each of the three people knows the type of person each of other two is. for each of these situations, if possible, determine whether there is a unique solution and determine who the knave, knight, and spy are. when there is no unique solution, list all possible solutions or state that there are no solutions. 24. a says "c is the knave," b says, "a is the knight," and c says "i am the spy."

0if x and y vary inversely and y=6 as x=7, what is the constant of variation?