answer with details please A serum sample needs to be dilute

answer with details please?

A serum sample needs to be diluted. A total volume of 5mL of a 1:50 dilution is required to perform a test. How much serum is needed to make this dilution? A 4 percent (4%) solution of red blood cells needed. What dilution of packed red blood cells does this represent? 1:96 1:25 96:1 4:1 1:4 A technician needs 4 ml of a 1:80 dilution of serum. A 1:4 dilution of serum is available. How would you use a 1:4 dilution to make 4ml of the 1:8o dilution? (Remember: C_1 V_1 = C_2 V_2)

Solution

Answer c :4% means 100/4 = 25 so answer c is correct

Answer . C1V1= C2V2 , Dilution factor = final volume /initial volume = 8/4= 2

So it will diluted twice to get desired concentration