Một hộp gồm có 5 sản phẩm loại I và 6 sản phẩm loại II. Lấy ngẫu nhiên (cùng 1 lúc) ra 3 sản phẩm. Gọi X là số sản phẩm loại I lấy ra trong 3 sản phẩm đó a. Tìm quy luật phân phối xác suất của X
b. Lập hàm phân phối xác suất của X
c. Tìm kì vong toán, phương sai của X

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

In each of the cases that follow, the magnitude of a vector is given along with the counterclockwise angle it makes with the +x axis. use trigonometry to find the x and y components of the vector. also, sketch each vector approximately to scale to see if your calculated answers seem reasonable. (a) 50.0 n at 60.0°, (b) 75 m/ s at 5π/ 6 rad, (c) 254 lb at 325°, (d) 69 km at 1.1π rad.

Sue's average score for three bowling games was 162. in the second game, sue scored 10 less than in the first game. in the third game, she scored 13 less than in the second game. what was her score in the first game?