I’m pretty sure that the answer is C+D because those numbers, when you find the square root, are real numbers.
Answer:
since the unknown amount can buy 100 pencils
he bought 70 pencils
therefore $4.50 can buy 30 pencils
so 1 pencils cost $4.50 /30=0.15
The median of this number set would be 2.5 because when you count evenly from both ends to the middle, the numbers should be added (to give you 5) then divided by 2.