In a given population of two-earning male-female couples, male earnings have a mean of 50,000 USD per year and a standard deviation of 15,000 USD. Female earnings 48,000 USD per year and a standard deviation of 13,000 USD. The correlation between male and female earnings for a couple is 0.90, Let C be be the combined earnings for a randomly selected couple • What is the mean of C

option 2 is correct.

step-by-step explanation:

we are given two inequality equation

x+y> 5 and -3x+2y< -2

first we draw the graph of both function using t-table method

equation: x+y> 5

for x=0, y=5

for x=-5, y=0

table:

x   :   0     5

y   :   5     0

test point (0,0) , 0> 5

false

equation: -3x+2y< -2

for x=0, y=-1

for x=2, y=4

table:

x   :   0     2

y   : -1       4

test point (0,0) , 0< -2

true

now we draw the graph. see the attachment for graph.

common region would be solution set.

option 2 is correct.

the answer is a if my teacher taught me correct