1. in a batch of 10 items, we wish to extract a sample of 3 without replacement. how many
diffe...
Mathematics, 13.08.2019 16:10 MorallyGray
1. in a batch of 10 items, we wish to extract a sample of 3 without replacement. how many
different samples can we extract?
2. let x and y be independent random variables. suppose the respective expected values
are e(x) = 8 and e(y) = 3 and the respective variances are v(x) = 9 and v(y) = 6. let z be
defined as z = 2x - 3y +5. based on these data, the value of e(z) is_ and the value
of v(z) is
3. the ratio of milk water in 55 liters of adulterated milk is 7: 4. how much water must be
added to make the mixture in a ratio of 7: 6?
a) 5 liters
b) 10 liters
c) 15 liters d) none of these
Answers: 2
Mathematics, 21.06.2019 18:00
On a piece of paper, graph y< x+1. then determine which answer matches the graph you drew.
Answers: 2
Mathematics, 21.06.2019 20:30
There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?
Answers: 3
Mathematics, 21.06.2019 21:00
Apiling for a high-rise building is pushed by two bulldozers at exactly the same time. one bulldozer exerts a force of 1250 pounds in a westerly direction. the other bulldozer pushes the piling with a force of 2650 pounds in a northerly direction. what is the direction of the resulting force upon the piling, to the nearest degree? a. 65 n of w b. 25 n of w c. 45 n of w d. 35 n of w
Answers: 1
Mathematics, 21.06.2019 22:30
Atotal of 766 tickets were sold for the school play. they were either adult tickets or student tickets. there were 66 more student tickets sold than adult tickets. how many adult tickets were sold?
Answers: 1
Physics, 03.07.2019 02:40
Mathematics, 03.07.2019 02:40
Mathematics, 03.07.2019 02:40
Mathematics, 03.07.2019 02:40
Mathematics, 03.07.2019 02:50
English, 03.07.2019 02:50
History, 03.07.2019 02:50
Geography, 03.07.2019 02:50
English, 03.07.2019 02:50