Answer:
3026
30
Step-by-step explanation: Average sum of the female and male's test score is the sum of expected value of each gender:

Assuming x represents the random male selected and y represents the random female selected:

3026
The average sum of their scores is 3026.
Average difference is the difference between the expected value (mean) of each gender:

1528 - 1498
30
The average difference of their scores is 30.
Answer:
x = -2
Step-by-step explanation:
x = -2, is a vertical line, y = 5 is a horizontal line.
I think it would be 1,3, and 4, but I'm not sure
X <span>≥ 5.5.
So it can be anywhere from 5.5 to </span><span>∞ (infinity)
P.S this symbol </span>∞ <span>is sometimes called a </span>lemniscate