Một cỗ máy có 3 bộ phận 1 2 3. Xác suất hỏng của các bộ phậ trong thời gian làm việc theo thứ tự là 0,2 ; 0,4 và 0,3 a, tính xác suất có 2 bộ phận bị hỏng b, cuối ngày làm việc được biết rằng có 2 bộ phận bị hỏng. Tính xác suất để 2 bộ phận bị hỏng là bộ phận 1 và 2

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys

Data from 2005 for various age groups show that for each $100 increase in the median weekly income for whites, the median weekly income of blacks increases by $105. also, for workers of ages 25 to 54 the median weekly income for whites was $676 and for blacks was $527. (a) let w represent the median weekly income for whites and b the median weekly income for blacks, and write the equation of the line that gives b as a linear function of w. b = (b) when the median weekly income for whites is $760, what does the equation in (a) predict for the median weekly income for blacks?

Due to a packaging error, 4 cans labeled diet soda were accidentally filled with regular soda and placed in a 12 pack carton of diet soda. two cans were randomly selected from this 12 pack. what is the probability that both cans were regular soda?