Answer:
5 ounces of solution are left in the bottle.
Explanation:
Volume of the staining solution, s = 30 oz
Volume required for the blood staining test =
of solution

Volume required for blood tests =

Number of blood staining tests run = 1
Volume of solution required in 1 blood staining test ,x= 22.5 oz × 1 = 22.5 oz
Number of blood test run = 5
Volume of solution required in 5 blood test ,y= 0.5 oz × 5 = 2.5 oz
Volume of staining solution left : s - x- y
= 30 oz - 22.5 oz - 2.5 oz = 5 oz
5 ounces of solution are left in the bottle.