Giả sử tỷ lệ bị bệnh X tại 1 thành phố là 9%. Khám ngẫu nhiên 81 người tại thành phố này, tính khả năng để có 27 người bị bệnh X.
Cần khám tối thiểu bao nhiêu người để khả năng gặp ít nhất 1 người bị bệnh X không ít hơn 9%?

You are assembling pieces of an iron gate to complete a fence. the finished gate will look like the one below. in order to assemble the gate it is important to under how the pieces are related. part 1: how are pies 1 and 2 in the archway related? part 2: how are the rectangular sections 5 and 6 in the center of the gate related to each other?

Abaker makes 186 cookies. some are chocolate chip and some are oatmeal raisin, and both kinds are made with and without nuts, as shown in the table above. because they are more popular, the baker made 2/3 of the cookies chocolate chip. if a chocolate chip cookie is chosen at random, what is the probability that it will have nuts? a) 21/93 b) 21/62 c) 41/93 d) 21/41

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)