Bài 4.6. Cho hàm khối xác suất đồng thời của biến ngẫu nhiên hai chiều (X, Y) có dạng
f(x, y) =k/xy
x = 2,4,6; y = 1,2,3.
a) Tìm hằng số k.
b) Tìm hàm khối xác suất biên của X và Y.
c. Hỏi X và Y có độc lập không? Vì sao?
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option 1 is correct.

step-by-step explanation:

y varies inversely with x and constant of variation is 4

the equation will be:

y = k/x

where k =4 so,

y = 4/x

if we put values of x of option 1 in the above equation and find values of y

y = 4/-2 => y =-2

y = 4/-1 => y = -4

y = 4/1 => y = 4

y = 4/2 => y =2

so, all the values of x and y are correct.

if we put values of x given in other options and find value of y we cannot find whole table satisfying the equation.

hence option 1 is correct.

the median here is 25. your lowest value is 14 and highest value is 48. to find the third quartile, find the medium number in between 25 and 48 which would be 42 i believe.

step-by-step explanation:

215.92 dollars is the answer