.Có 2 xạ thủ loại 1 và 8 xạ thủ loại 2, xác suất bắn trúng đích của các xạ thủ theo thứ tự là 0,9 và 0,8 a. Lấy ngẫu nhiên một xạ thủ và cho xạ thủ đó bắn một viên đạn. Tính xác suất bắn trúng đích

b. Lấy ngẫu nhiên hai xạ thủ và mỗi người bắn một viên đạn thì khả năng hai viên đạn cùng trúng đích là bao nhiêu?.

Marian is itemizing deductions on her federal income tax return and had $1500 in non-reimbursed work expenses last year. if her agi was $46,000, and if non-reimbursed work expenses are deductible to the extent that they exceed 2 % of a taxpayer's agi, how much can marian deduct for non- reimbursed work expenses? a: $30 b: $580 c: $920 d: $1470

What statement is true about all chemical changes? a) chemical changes can be undone. b) chemical changes cannot be reversed. c) chemical changes change the color of objects. eliminate d) chemical changes do not form new products.

In a speech before the american society of newspaper editors (april 16, 1953), president eisenhower stated: "every gun that is made, every warship launched, every rocket fired signifies, in the final sense, a theft from those who hunger and are not fed, those who are cold and not clothed. this world in arms is not spending money alone. it is spending the sweat of its laborers, the genius of its scientists, the hopes of its children. this is not a way of life at all in any true sense. under the cloud of threatening war, it is humanity hanging from a cross of iron." do you agree or disagree?