풀이 좀 해주세요
1. what is the approximate difference, in dollars, b/w the median of the region with the highest median salary for the ten different possible years shown and the median of the region with the lowest median salary for the ten different possible shown?
A. 1,000
B. 2,000
C. 2,500
D. 3,000
E. 5,000
답 E
2. the current ratio of boys to girls at a certain school is 2 to 5. If 12 additional boys were added to the school, the new ration of boys to girls would be 4 to 9. How many boys currently attend the school?
A. 27
B. 48
C. 54
D. 108
답 D
3. Given a point on the x-axis [-k , 0] at point 'R' and another point S [m,0] on x-axis which is not shown in the figure is given. If 선분RS = k^4, then
col A : m
col B : 0
답 D
4. Given that two cyclists are moving towards each other at speed of 20 miles/hour and they are about 100 miles apart. At this instance a fly starts from one cyclist and move towards other and moves to and fro till the two cyclists meet each other. If the fly is moving at 30 miles/hour, what is the total distance covered by the fly?
답 75 mile
5. In a set of numbers from 1 to 10, if two numbers are to be selected from these 10 numbers with replacement, then what is the probability that at least one of them is even?
답 3/4